Mark here!
This happens sooooooo much with us... it's terrible!
Luckily the other couple is always attracted to us.
I like 95% of the women
My life-partner usually doesn't like the guy.
I understand why. I know enough about women to understand my partner.
In these cases, we have two solutions:
1 - My partner says, "Go ask them to have a threesome"
or
2 - We try to lure the woman over to have a threesome with us.
We were lucky last Saturday! She came over alone!
That was fun!
...but I won't let my spouse take one for the team. It's not nice. Although damn tempting!!! Happened last weekend. Nothing happened. Maybe I'll go there for a 3some if they invite me... my partner is totally cool with that......