Dear Queenie,
My son lets my grandson (his son) use the bathroom at the same time he does, like one shaving while the other is taking a shower, and his wife is the same way with their daughters.
Queenie, do you think this is proper?—Bathroom Etty Ket
Dear Etty Ket,
This certainly does seem to be my week for Etty Ket questions!
To answer yours, I do not see anything improper about it. It is much the same thing as people of the same sex sharing a locker room at school or at the gym.