Help! I'm Having Passionate S*x with My Mother's New Husband Every Night - Young Lady Cries Out

I need help!

 

My dad died some time ago and my mum has moved on after she found a new man to whom she got married.

 

My mom and step dad have been together since then.

 

My step dad and I had never slept together until a few months ago when my mom found out she was pregnant, which I guess limited their s*x which is why he came onto me one night while I was “asleep.”

 

Anyway he only fingered me at first, and I told my mom out of fear. She said maybe I was only dreaming and not to worry and that she would talk to him about it.

 

So fast forward a few weeks after. I awoke one night and saw my step dad having sex with me. I just laid there until he was done.

 

After a while, I began enjoying it, and returned the gesture.

 

So we’ve had s*x too many times since then and I’ve rode him. My mom knows and does not care because it was consensual s*x and was not in any way rape, as I did f*ck him back.

 

So should I continue sleeping with him? I stopped shortly after my brother was born and have not had intercourse with my step dad since, my brother being a month old. 

 

Now we are having s*x virually every  night.

 

By the way I am underage but my exact age probably doesn’t matter.

 

Should I stop this act? And how can I stop, please?