Okay, mil has a relatively new partner, they have been together 18 months and are getting married in a few months. Dp and I have met him quite a few times but aren't too sure about him (there's a few reasons for this but would take forever). He's very over familiar yet we consider him pretty much a 'stranger' to our dd. mil was bathing ds and he was in bathroom too. The next night, dp and i left dd with mil for an hour while we had Chance for heart to heart sat in the car! we went Indoors abd her partner was Bathing dd alone. i just feel uncomfortable with this as they live quite Far away from Us and we Dont see them very Often so i dont feel we know Him well enough. There's nothing sinister here and I do not think anything badly of him but it doesn't feel 'right'.