My partner and I are going away for a weekend. We have two daughters, 2 and 4 years old. My MIL is coming across to our house to take care of them whilst we’re away, I’ve only ever left them overnight with my parents before, so this is a big deal for me anyway. But to add to it, she is bringing her bf along, they’ve only been together for about 6 months and I don’t know much about him and have only met him a few times. I recently found out that he has a criminal history and has been to prison. I got my partner to ask his mum about what the charges were for and was told it was for burglary and assault, but it was years ago. AIBU to not feel comfortable leaving my kids overnight with this guy?