Re: what to do.....
i suggest you receive his call atleast once or twice..record it, and make your friend listen to it..that way she would know you are not lying..but, be careful when you talk to him, make the conversation very clear...ask him why he's calling you, he needs to stop, you will tell his wife..and you are not interested..blah blah....
and then see what happens...if i was in that kind of situation..i would quit hanging out with that friend, especially when she is a very good friend..i wouldn't want to cause any problems in her married life..so i woul step back, and cut ties with her.