I have have had a similar situation for years. I prefer regular playmates verses new playmates often.
I met this couple through another regular couple that I had met but they were moving away. We met a few times for drinks and conversation and eventually started having hotel playdates.
We all go on so well that we started socialising more. The three of us would go out to dinner together , local football games and such. Due to the fact that the husband and I actually attended the same university in overlapping years, I suggested that if any of their friends and family asked how we know each other, we would say that we met in school. This worked so well that they started inviting me to they ******* birthdays, holiday celebrations and the like.
The access that this gives one to fuck the wife of a couple is unparalleled and I have been fucking the wife for over a decade now. Meeting her alone or with hubby, overnights when the ******* were very young. The ******* know me as a good friend and I have watched them grow up to young adults.
The enclosed picture collage is after their daughters 2nd B day party. The husband asked me if could assist with something outback as the last few family member and frieinds left the house. Whe we came back, the wife pushed me on the bed and proceeded to take what she wanted ad indicated in the pics. the young ******* were asleep downstairs .That was a good night but only one of many.
Takes work but this relationship has been very rewarding for all of us.
I have moved away but we still meet up either there or were I live at least twice a year.