Mother in law is jealous!

My mother in law gets jealous whenever me and my fiancé are doing something. She keep telling him why ur doing that with her and not with me.

She also doesn’t like me, her attitude and her face whenever she sees me.

She act that she’s sick specially on his “days off” so he can bring her food to bed and take care of her. My mother in law is 50.

Whenever my fiancé not around her voice is loud and calling her friends and laughing so loud, whenever he comes back from work she gives him the sad innocent face with a very very low voice and sick voice.

She keeps telling him am angry at you. When he ask her why? What I did?

She say: “ I don’t know” and then she starts hugging him like a little baby.

In the middle of the night while he’s sleeping she comes and starts kissing him..

Her relationship with her husband is bad, as if they are divorced and no physical or emotional connection between them, and sometimes he doesn’t come home at all. I feel she’s trying to make my fiancé her husband.

And whenever we talk about our marriage she starts to get crazy.. and telling first ur sister gets married then you!!

She also keeps saying she doesn’t want grandkids for now!! She also want to decide when To get pregnant!! Am the middle of my thirties!

Help me !