Yeah, no, you need to cut them out of your life and never look back. The fact that 1) they have a special interest in you, 2) they sound like they have a weird attraction to kids, and 3) you say you’re disabled in some way seems like you’re being preyed upon. Good on you for picking up on things, now you need to act on your feelings, stop giving them the benefit of the doubt, and get away from that situation.