Our 10 yo DS1 has recently taken to playing with another child his age who lives nearby. I've recently found out that DP has been letting DS1 and DS2 (5 yo) go to the friend's house unaccompanied when he's at home with them and I'm at work. Not a problem, only one residential road to cross and DS1 can be responsible with DS2. However, it turns out DP is then allowing DS1 and 2 x friends to go to our local parks with DS2 without an adult going with them which to my mind is hugely unsafe.
One local park involves no road crossings but is an urban park with a varied clientele (not all entirely savoury) the other is leafier but involve crossing a number of roads.
I know DS1 would try to look after DS2 but when he's with friends he can get distracted, added to which DS2 is an impulsive 5 yo who tends to be v free range and apt to wander off and make new friends.
DP seems to think I'm over-reacting so I'm after a reality check here. It's a real red flag to me and not something I'm happy with, AIBU?
If not, and if I can't persuade DP of the dangers here, what would you do? -