DD1 is 15, DD2 is 12. I'm 39. DD2 told me the other day boys at their school are saying DD1 has a bit of a reputation and asked me what a town bike is (awkward). Haven't wanted to invade DD1s privacy and have told DD2 to pay no mind and not upset DD1 with rumours. Should I broach the subject with DD1? How should I say it? I am by no means assuming the worst but would like to be in the loop