Agreed, this kind of thing can be a real turn on. Knowing it is happening and not seeing can make the imagination run wild. It can also be a turn on because no matter what you are doing with the other guy and how passionate you are being, your husband cannot stop it or interrupt it and that is very hot!!
You said that you have let your husband watch you give the friend a blow job and swallow. A passionate kiss with your husband right after swallowing another man’s cum can be quite erotic. Especially done in front of the friend and surprising your husband with it so that he does not have time to react before it is done.
