I don't know who is responsible for my pregnancy

My dad died when I was two years, and my mum married another man. I respect my step father as my real dad.

I have lived with him all my life with a number of his siblings who I considered as my aunts and uncles until one of his brother raped me.

He used to care so much for me, he would send me money while at school. I even introduced him to my boyfriend and he promised not to tell mum as I was not ready to introduce him to my family.

However, one day when we were alone at home, he raped.

I was so afraid to tell anyone and two days later, I had sex with my boyfriend..

I'm now two months pregnant and I don't know who is responsible of my pregnancy of the two men.

 Can I tell my mum about it or should run away with my guy.

Anitah