Assuming my mother is still alive and is receptive to being contacted, how should I do it? I know I would need to apologize but beyond that I'm lost.
This is awfully reminiscent of a problem I'm currently having, but with my father: I think he could be dead and nobody in my family bothered telling me. I hope that you aren't also insinuating something similar. That is, your mother has passed away, nobody told you, and so you never got to attend her funeral.
But my mother is a good person and has always loved me. I'm not sure but I think she would want to get back in touch with me.
You realise what you're saying? Because you've ignored your parents for 5 or so years, you've totally killed the maternal bond you have with your mother to the point that she wouldn't want to see you again before she dies. Even if she only loves you half as much as you think she does, I would say that she really misses you.
But he has probably lied to my mother about the incident to gain her sympathy so I'm not sure she would side with me to keep him at bay.
She might placate him just to keep the peace, but I bet she knows how much of a dick your father is.
If I get back in touch with my mother I would want to do my best to make sure he doesn't find me or think that I will talk to him.
More likely the latter. That is, that all is forgotten and you're all cool. This complicates matters a little because if you want a meaningful relationship with your mother, you will have to interact with him in some awkward way or "sneak around" to meet up.
To make things worse, I have a child that I know my mother would love.
Assuming my mother is still alive and is receptive to being contacted, how should I do it? I know I would need to apologize but beyond that I'm lost.
If you're concerned that you're not going to be able to keep your emotions in check i.e. cry, then I would suggest a very brief letter.
Tell her that you have a kid now, and that being a parent to that child has brought back memories of your own childhood, which made you think of her. Tell her that you miss her and that you'd really like [Insert Child's Name] to meet grandma [Insert Mother's Name].
Include a photo of the kid, but only if you don't think she'll consider it a form of emotional blackmail, and include your phone number. Don't mention your dad.
I'm sure you have your reasons for wanting to apologise to her, but I think if you want to apologise, you should wait to see her in person to do that.
Best