In need of some serious advice.

I had my baby boy only several months ago, but lately, i've been dwindling in my thoughts. Almost 3 years ago my father raped me and was sent to prison 2 years ago for 3/4 years. I was diagnosed with PTSD after the fact, was only 16 years old, and am now turning 19 this year and have a no contact issued with him until age 30.

My question is- what do I tell my son when he's my age if he ever asks about his grandfather? I don't want to lie to my child, i'm fearful that his side of the family will contact him and i'll look like the bad person. That's how I myself got into the mess in the first place, was my family lying to me. I'm afraid for him to find out on his own however.

I realize this is a terrible "topic" and i'm sorry for offending anyone. But please, what would you do, mothers?