My XH and I split just over a year ago and we have x3 DDs (11, 8, 8). He has them every other weekend at his house. Him and his gfrnd are away next Friday night and he’s asked DSS (20) to collect the girls from school and have them overnight until they get back late Saturday night. I’ve also found out that XH gfrnds DS (18) who I’ve never met will also be there. AIBU about not being comfortable with this? I’m away next weekend so I can’t have them but I just worry so much when they are away. I trust DSS and have known him since he was 3, he’s a great kid but he has no experience of childcare or young children. Would he know what to do in an emergency etc. I don’t have a great relationship with XH and we have no parenting plan. He says I’m being controlling and I guess I am but the girls have never been left before other than a parent or grandparent overnight. Am I overthinking this??