Should I risk my in laws making a scene?

Question

I am Catholic and my fiance is currently taking catechism classes. He is not yet 100% certain that he wants to join the Catholic Church, but he does want to support me in raising our future kids Catholic and has agreed to getting married in the Catholic Church. For those of you that don't know, you need to be Catholic to get married in the church with a mass. But if both of you are baptised Christians you can be married in the church, but only with a wedding service. My priest has agreed to marry us during mass because our family will follow the church and my fiance is in catechism classes. 
This is a bit of a tricky situation because his family is Pentacostal and has a strong dislike for Catholics. They've really pushed back on our wedding being Catholic, but my fiance has been very firm on this point with them. Well, during the mass there is communion and in Catholicism only Catholics can take the body and blood of Christ because unlike other Christian denominations we believe that IS the body and blood of Christ and not just a representation. My priest knows that my fiance's family is not Catholic so he will not allow them to take communion. 
My future MIL has informed us that she will be taking communion and doesn't care about 'Catholics stupid rules' and that if the priest tries to stop her she'll make a scene. Now, part of me doesn't beleive her as she doesn't like drawing any kind of attention to herself in public at all. But, I'm also afriad she will. My fiance told her he'd personally remove her from the church if she tried that and that itd cause a huge rift in their already unsteady relationship. But she says she doesn't care. My fiance's foster parents (his mother lost custody of him as a child and he's closer to his foster parents then he is his birth parents) have offered to sit next to her and stop her if she tries to stand and recieve communion. 
But, I still fear there will be a scene. I don't  want to uninvite her though my fiance has told me if she continues on like this he will uninvite her himself. He knows how important having the mass is to me and wants to support me in my faith. He doesn't want me to give up the mass and just have a service. And neither do I, but I don't need more family drama or a big scene everyone will talk about either. I just want our families to come together and be happy.

Answer

Honestly, I don't think it's fair to draw denominational lines. To someone that isn't Catholic, that's basically saying that anyone not Catholic can't do communion because they aren't "Christian enough." Granted, she is being a jerk about it, but I think I would be hurt too. Definitely don't cave for fear of making waves, but maybe stop to consider why this is such a big issue to her.

Answer

All I can say is, good for your fiance for standing up for you! 
Don't allow your future MIL to ruin your wedding. If she makes a scene, then she makes a scene. If she goes up to take communion, let the Priest handle it, but maybe speak to him about her beforehand, if you haven't already, it's really his responsibility. I don't think there is a need for physical force, the consequence of her actions will be on her soul. You can only tell her how you feel and what the dogma of the church states and the rest is up to her. 
I'm sorry you're going through this. I know what it's like to have family at odds with your faith. I am Eastern Orthodox but I'm from a deeply protestant family and my stepbrother is like the poster boy of the Reformation. It's a very uncomfortable situation. I pray your wedding goes well! Congratulations on your upcoming union!

Answer

Catholic is Christian. It’s a religious denomination of Christianity. She should respect the rules of your faith. Your fiancé needs to make it clear she should respect your boundaries or don’t come.

Answer

I’m Pentecostal and my husband is a converted Episcopalian based on the Church he attended when he came the US as a teen. My brother in law converted from Methodist to Pentecostal by choice as well. 
If getting married in a Catholic Church means so much to you, come to compromise that both sides of the family will agree to for the wedding. I realize that some Catholic priests are from the old school as with 7-Day Adventist who will only marry the couple if they under the same denomination of said religion. I believe your future children would benefit from being exposed to both sides of religious believes and when they are of age, make that decision for themselves. The Word of God doesn’t change, it’s how you live your life under His guidance that counts the most.

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However this goes, good luck, but I must say, good job on keeping your morals in check! I love that you have your priorities and you won't let some misguided woman stop you from pursuing your faith in marriage 😍😍😍 truly goals

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Years ago,I really had just the thinnest shred of faith.I believed in a higher power,just wasn't really sure of what kind.My ex husband was Irish Catholic(had been an alter boy, and took communion and mass often).We had a Methodist ceremony,anyone who wanted to, could take communion and it combined my family's Baptist,Pentecostal,Lutheran an Non Denominational faiths.Since marriage is God joining 2 of you together,maybe you could try finding a religious ceremony that does the same.

Answer

If it comes down to asking her not to come I would do that. Specifically to honor your husbands commits to stand by you in having a wedding with a mass. Try to offer a middle ground. I’m Pentecostal and have a lot of things that I disagree with when it comes to Catholicism, so I can understand to some degree. Though I’d never be so rude. Try to explain how important those traditions are for not only the Catholic Church but your faith ( or have your fiancé do it if it won’t be well received by you ) and if you’re comfortable with it maybe offer to have a private communion after the ceremony, before the reception, with just you your husband, and your in laws. So she knows that when it comes to your marriage she isn’t being booted out because of your faith. I imagine that it’s less of a catholic issue and more difficult for her imagining her son converting for you and then leaving her and the faith she raised him with behind. Like I said only do it if you’re comfortable with it. Don’t do anything that you feel like is against your religion or your relationship.

Answer

I'm sorry his mother and your future mother in law is so darn disrespectful. I do want to say/ask, if there's no Mass, you wouldn't/shouldn't have the Eucharist in your wedding? To prevent anything, simply have the wedding ceremony but don't celebrate Mass with it. Or, though I don't know how you and your fiance feel about it, simply ban his mother from the wedding.                           My husband is protestant and I'm Catholic. We did a full traditional Catholic wedding with a Mass, but my husband and I had to step back from the altar and my priest actually gave a small talk before the liturgy of the Eucharist started, requesting only Catholics in good standing may receive our communion. My husband's family sat, respectfully. It was the protestants( they left Catholicism) on my side who spoke and acted similar to your soon to be MIL.                                   I'm glad your fiance is standing by you and agreeing. But I'd still bring up those two options to him and get his thoughts/opinion.

Should I risk my in laws making a scene?

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