My best friend's husband is hitting on me do I tell her?

My best friend invited me to go on vacation with them to a cabin that they rented last year in Aspen. We had a blast and I was enjoying myself until her extremely gorgeous husband cornered me by myself and started hitting on me( ie, trying to kiss me, grabbing my rear end, making suggestive comments, etc..) I have repeatedly fought off his advances to the point of slapping him. He just laughs it off and says one day I'll come around and see what I'm missing. The jerk is still doing this even after the trip. Whenever I come over to visit, see them at gatherings such as weddings, parties and such, it's awful. It's to the point that I cringe every time I see them and I visit their house less and less. The reason that I haven't told her is because she so in love with him that she is blind to his antics. Her husband cheats on her constantly and when she finds out: she blames the other women. He hit on another one of our friends and she confronted his wife. The wife cut her off without a second thought and blamed the friend; saying she must have been behaving like a tramp and come on to him. I'm close to ending this friendship because this is getting on my nerves. Should I just tell her and say good riddance to the friendship?