So how do you deal with this

My fiancée and I have been together for over a year. We are pregnant and during the course of our relationship his sister has tried to find ways to break us up. She sent flowers to my work, had her friend hit on me. Drugged me sent pics to my fiancée ( bf at that time.)

Suddenly shes pregnant again, and I am pregnant as well. She is telling the family that Im a drug addict and mentally screwed up etc. so now his stepmom doesn’t want anything to do with me.

She’s just nasty of a person.

Now shes trying to isolate him away from me by making false claims to their mom.

All i did was stand up and say the truth. She doesnt know who the dad is to the baby. She slept around way too much, and she told me.

( also as an edit..

Some of you think that im broadcasting her crap but the truth is she lied to me. She lied to her whole family about her pregnancy. She even drank throughout it. Its a concern especially when she is talking suicidal and also she broadcasted my doubts about getting married so soon to her mom. Causing conflict yet again.

So how am I wrong?

She made it my business the moment she admitted she was trying to kill her unborn baby.

She admitted to sleeping around.

She needs help.