To keep it short: my ex-wife cheated on me with this guy, we divorced, she married him immediately after. Since January we’ve been co-parenting, she has our son (14 years old) for 2 weeks & I have him for 2 weeks. Her now husband is wealthy, and for the winter holidays they plan on going to the Maldives for 3 weeks (I agreed to give up 1 week of my 2 weeks; gonna get +1 week with son after the vacation). Apparently son has been asking his mom and stepdad if I can come as well. So ex-wife calls me and asks me if I’d like to go, all expenses paid by them, just to be with our son and have some fun - and let’s “put all the bad blood behind”. I told her I’ll think about it, but honestly I don’t think I’d feel comfortable. At the same time going would make son extremely happy obviously. Idk.
Sounds to me like the kid is also having some feelings surrounding the breakup and subsequent remarriage that aren’t being addressed. Why does he want you to come too? Is he hoping it might bring you and his mom back together? Does he feel uncomfortable around the new stepdad, and wants you around because he’s more comfortable when you’re around? I think if you have a conversation with him as to why he’s asking for you to come too, it might influence how you approach the situation, or at least give you a better way to explain why you can’t come due to your own reasons.
I know this is a difficult decision on your part for how it affects you, but your son is also in a very vulnerable position right now, and needs both of his parents paying attention to him and the feelings he’s having, even if he doesn’t know how to express them directly. My parents broke up suddenly due to cheating when I was around the same age, and it was a traumatic time in my life because my parents both assumed I was old enough to “get it.” I wasn’t. Family is one of the main sources of stability in a young person’s life, and to have it fall out from beneath you isn’t something you get over on your own very easily.