Baby Momma Can't let go!

My husband has 2 children by another woman and I'm currently 11 weeks pregnant...

She is a psycho we've been married for 3 years and it's like she can't get over my husband.

Example #1: she sent my husband naked pictures so he would have something "good " to look at cause according to her I'm fat and ugly.

Example #2: She sent me pictures of her tattoo of his name because "I need to know my place".

Example #3: She called last month and asked him to go on vacation with her.

Example #4: If I text to ask about the kids she will completely ignore me but if my husband text she will text I miss you and I'm jealous you're married...

I've seen the messages between them and he always tells her he's not interested and he's married... I'm just wondering how long I have to stay calm...