<human>: When I was 14 my stepdad drunkenly confessed his lust for me and trapped me in a multi-hour conversation in the middle of the night in my bedroom about how connected he felt to me and how my mother wouldn't understand. I told my dad/stepmom the next day and the police paid my stepdad a visit. He didn't touch me so he couldn't be charged with anything but was warned. I didn't see him for a year (I already lived with my dad) and my mom stayed with him. Therapy all around.

I eventually did forgive him for the incident. I've never had any indication he's done anything else like that and he's always been extremely remorseful. I actually have a much harder time forgiving my mom, because I can't imagine staying with someone who did that to my daughter. Even so, it was decades ago now and we have mostly put it behind us.

However, I now have two small kids (8 and 3) and my mother has mentioned a few times she can't wait until they're old enough and they can come visit my mom and stepdad for a week like I used to do with my grandparents. My mom is fantastic with kids and I have no doubts about leaving them alone with her. My stepdad... has never raised kids (I was 11 when they married and he was 24), has shown terrible judgment in the past and has a few questionable habits now (lots of pot smoking) which make my husband and I not want this type of visit to occur. In fact, I don't want him being alone with our kids, nor does my husband. I don't exactly feel like the same situation would reoccur, I just mistrust his judgment and awareness of boundaries, which obviously stems from my past experience with him.

So the kids are too young for this visit to be an issue at the moment, but I feel like I'm anxiously sitting on this conversation I need to have with my mom. Any suggestions on how to approach it?

Summarize the given text in a few sentences.
<bot>: I don't want my kids to visit solo my mom and stepdad due to past inappropriate behavior by my stepdad. How should I address this with them?