NTA. Then send them a link to this book: Dare to Repair: A Do-it-Herself Guide to Fixing (Almost) Anything in the Home https://www.amazon.com/dp/0060959843/ref=cm_sw_r_cp_api_i_HwvwFb8S9D17H
But he also needs to stand up and say he is uncomfortable with their advances. You are not his keeper. You are his partner. I would say, go with him and back his play, but HE has to confront these ladies head on and point out how inappropriate they are being.
http://www.amazon.com/dp/0060959843
Hell, PM me your mom's address and I'll send it to her.