Wedding guest questions

So my now fiancé and I have been talking about wedding and honeymoon arrangements like what we would like and how and when.. so I had a couple questions.

I posted on Facebook of our engagement and my aunt posted “when’s the due date”

And I replied “idk yet it just happened we have some planning to do” and she replied with “no I mean due date🍼” and I replied with “haha good one”... I didn’t know what to say I was takin back by how rude that was like I have to be pregnant for him to ask my hand in marriage.. while I am ttc none of my family know that and I felt it was rude to assume that’s the only reason he would marry me.

#1 so my question is would you invite someone like that to your wedding?

On another subject, my fiancé has a cousin who’s kids are wild children in church always on the stadium during service, i am worried that these kids are going to be wild and in the middle of the isle while I’m walking Down it.. I want kids at my wedding but I want them to behave during the ceremony.. how did you handle this? and did you put anything on your Invitations to mention children behaving? I do plan on doing something for the kids during the reception.. the ceremony has me a tad nervous