My mother in law is dating married man, what should I do?

[thekillers_lvt]

I and my husband just get married, we can't get rid of his mom 'cause she had nowhere to go. (since her husband dump her 'cause she was cheating on him)
My mother in law has been dating this guy for years now. According to her, he has a family, grandchildren and stuff. What make me feel so bad about this situation is: this guy's wife is disable because an accident from work (b4 my MIL and him start dating).
My MIL tells everybody about how he cares for his wife, but on the other hand, she sat on my living room, called her friend, told her friend about how good the sex between them is. ( that is inappropriate and annoying for me)
I feel sorry for the lady that always think her man is a good man and take good care of her.
My husband never agree with his mom's relationship. Since my MIL take her "boyfriend" home more often, I'm affraid that my husband gonna go soft on this.
I don't want my husband to think: it's ok to date another woman when your wife is sick, or disable.
I want to tell my MIL to stop, it's not right to do this to another woman. And, at some point, tell her to shut up about him ( he is a disgusting species to me!)
What can I do

 

[Megan S]

tell her nicely but firmly to leave and if she says no take her stuff and her and get her an apartment

 

[Cyn M.]

be up front about things to your MIL i think its the best thing you know just tell her how you feel then just mind your own business...

 

[Precious Gem]

Not much. Your mother-in-law is grown and can date whoever she wants. She has to live with the consequences
not you. As for her conversations ask her to hold those
phone calls in private as you do not wish to hear them.
Now for your hubby, ask him what he thinks about his
mom and her choices of friends? His response should tell
you if he will be the kind of guy who would cheat on his spouse if given a chance.

 

[I <3 chocolate.]

tell her to get out of your house. take her nasty business outta here.