My heart goes out to you, SadGramma! It's possible that this co is only temporary while dd calms down. But the situation sounds worrying enough that you may want to contact social services. Please realize that this MIGHT end up with the girls being taken away from her. But if it doesn't - and if she finds out/suspects you're the one who reported her and her bf, she MIGHT co you for a very long time. But, imo, it's worth the risk if those children aren't really safe. You need to give this some serious thought. (((Hugs)))
Estranged Son and Future Granddaughter
To think that London, or anywhere else for that matter, does not belong to any one demographic