Re: DH has concerns
You just have to be vigilant and use common sense. We do respite a lot for a ten year old boy. I have two daughters ages four and 12 months. He's never tried to go into dds' rooms or do anything to be alone with either of them. He's nice to my 4yo, but obviously does not care to spend time with her. The only time there is reason for them to be alone is if I go to the bathroom. If I had any reason to suspect he might try something, I'd just bring dd into my room while I used the bathroom.
DD's three oldest sisters were molested, but have never acted out in anyway, so I don't give any thought to letting them be alone with dd.