So my exdh of seven years asked me to have a 3some with him and his current wife. We dont fight me and his new wife get along (we went out for a few drinks and shes really a great sm to my kids) . However this just isnt my cup of tea . Its weird to me that exdh would even ask me that considering that the last 3 years of our marriage was sexless(i had let myself go i was 5'7 and 285lbs ). Any way how do i respectfully turn the offer down with out causing tension between us? I really have a good thing going on and id like to be on friendly terms with them.