I've been living with this man for 11 years, and I'm shocked and disturbed by his behavior with this situation.
He has started masturbating a lot and wants sex all the time??

He's probably fantasizng about this woman while we are having sex.

I feel like I am not good enough in bed, although he tells me that I give him the best sex that he has ever had.

I guess I just need to tell him that this is not acceptable, to me, and go from there.
I never (EVER), thought I would have something like this come up with this man.
Wanting ME to talk to her about HIM wanting to have sex with her? NOT.

I don't want to ruin my relationship with this woman, or this man. He has been faithful, loyal and loving and now THIS.

Confused, Hurt, Sad,