I think throwing in worries of molestation, while valid, may sink your point a little bit because an unreasonable person will just focus on "hysteria."
The point is that you have carefully chosen a person as a caregiver and that person is not Billy. Billy may be a perfectly acceptable caregiver but you don't know that, you haven't explored it and don't wish to at this time, and the choice of care giver is a choice you feel strongly should rest with you and only you. It's inappropriate that the choice was not yours in this situation.
Mama to B and E, Wife to E
Parenting with Hugs and Terror since 2011