My Mothers Midlife Crisis......

So I thought that when a person hit their midlife crisis they were suppossed to buy a car, or maybe act a little immature for awhile.  Well in the case of my mother I don't know what to do!Sure, she raised her own kids, then my sisters kids, then my sister all over again, and she does deserve to live a little...but the way she is doing it is so horribly innapropriate that I don't know how to handle it.She is 51, engaged, and raising my neice at the moment.  And she has started to post half nude photos of herself all over websites.  She wants to hear all the 'positive' things men have to say.  But it's wrong!  It's disgusting, and I want to tell her what I think, but I don't want to hurt her.  Not that whats shes doing won't come back to haunt her.  She's posting these photos where friends and family can see them too.  And I hear comments about my skanky mum and they hurt.  Mostly because I'm starting to think they are true. I just don't understand.  She was the rock in our lives for so long...has she finally just snapped?