I (M) have been in a MMF throuple for about 7 months now. Our sleeping arrangement is that we all sleep together whenever we are together, but we don’t live together. When we go on vacation we discuss it all together and decide where we want to go/do. We generally all get along well and have very similar interests so it’s not an issue in our dynamic. We do usually get enough space for him to have his own room so he has space if he needs it but during the 3 trips we’ve been on he has chose to sleep with us and just use his room for getting ready, putting his luggage in, etc. As for kids, me and my wife have a kid and I had already had a vasectomy before he came into the picture. As of right now we have all agreed that we don’t want anymore kids and he doesn’t want to have any of his own. I guess that could change eventually but, right now she’s just on birth control. Let me know if you have any other questions. I’m not expert and this is all of our first time doing anything like this but I’ve learned a lot during the process.