lol at "slotting in"
OP, in that situation, if you are uncomfortable with it say no, do not feel under pressure to allow something you are uncomfy with just to appear like a "cool mum"
I am not a "cool mum" and have no intention to be one
I am my dd's mother, not her mate
yes, and she isn't asking permission to have sex, the question is whether to condone them sleeping together like adults under the parents roof
they are still schoolchildren, IMO
I wouldn't allow it, under these particular circs
they will have sex, that is for sure
but you don't have to let them "live" as adults under your roof, if you don't want to