Swinging (LONG story)

My husband and I have been considering getting experimental with another couple. We had been tossing out the idea just during dirty talk etc but we went over to their house Saturday night and we all got very drunk/high and ended up sleeping over. Super early in the night when I was alone with the wife she brought up their sex life and how boring it's been and how they need to spice things up. She said that they used to watch each other make out with other people and do crazy stuff at parties. They've been together 19 years so it was like kind of affirming to me to hear that they could do things like that and still have a great family life. So throughout the night we were all super flirty and touchy. Her husband was pretty stoned and zoned out and didn't really participate but my husband was all about it. For the most part it was just me and her that would like grind on each other and we shotgun smoked (which is basically kissing). And our husbands encouraged her to hold my boobs at one point. She wanted to shotgun with my husband but I hesitated when she asked if it was okay so she said she wouldn't because my friendship is what matters to her. My husband had actually egged me on earlier in the night to do that with her husband but I didn't want to make anyone uncomfortable so I didn't. As the night went on and we got tired me and the wife sat next to/on my husband and continued to flirt and he like fondled me in front of them. They laid out a mattress for us to sleep on in their living room and the couple went to bed in their room next door. My husband was too drunk to get hard but I started trying to fuck anyway and had my tits out when I looked up and noticed that the wife had come back to grab something from the room. My husband told her to come closer and give me a goodnight hug so I put my tits up and she came over but hesitated, thinking he meant to get in bed with him. She said she didnt want to piss me off and I hugged her then she went back to bed. After that we kept trying to have sex but he physically couldn't do it so he told me to go try to crawl into bed with the couple and see if they would. But I said no. We slept over and went to church together. Lol. My husband and the wife are in the worship band together.

So anyway I was thinking about it ALL day yesterday and when my husband finally came home from church I immediately wanted to fuck. And we did and it was amazing, then afterwards we started to talk about potentially swinging with this couple. I told him I'm open to it but my one rule would be no penetration. A rule I thought he would agree to because he has never ever expressed interest in being with another woman. He agreed to it but with hesitation so it spurred further conversation. We had a really good exciting long talk about it all. But he expressed that he thinks it wouldn't be a 4 people situation - he thinks the wife would be the only one joining in and the husband would be totally fine not. I'm not interested in the husband but I also don't want to just add a woman in with my husband... it makes me ill to think about him being with someone else. But if I was also with someone else I could get into it. He is 100% fine with me fucking someone else which is like insane to me but I would be open to it maybe. ANYWAY here is my big dilemma. We are prominent in the church and so is this other couple. She is the pastor's niece actually. We have a very strong Christian marriage and want to serve God. Obviously this is not okay in our religion. Or any religion. My husband argues that if its consensual and with another married couple it isn't completely horrible and that's my excuse for wanting it too but God doesn't give a shit about that lol it is still adultery if everyone consents. So even though its something we really want I am having second thoughts now because deep down I know that it is not a good idea. I kept telling my husband that it sounds good now but once we cross that line it can never be undone. Not to mention I actually ended up confessing to him last night during our talks that I slept with someone else when we broke up for 2 months 6 years ago, and he literally cried. LITERALLY CRIED about it even though he doesn't know the guy and we were totally broken up at the time and it was 6 years ago. He said it's not the sex that bothers him about it, it just brought up old feelings. So I really don't think that either one of us is truly okay with swinging. But I know that it's going to keep heading in that direction with our friends. I'm okay with kissing - me and her, her and my husband, or me and her husband. And just being flirty. But I think that's where the line has to be drawn.

Agree? I need to know if I'm right to feel this way. I think deep down we both know we shouldn't actually swing but our lust is overpowering us.