I would suggest silently looking for a different job because that can easily turn to an unsafe and unpleasant work environment. FYL OP.

Start looking for a new job. That could turn into a hostile environment, in which you could not perform to what you know you can do. Also try and help their daughter get a new job so she doesn't have to deal with the hostile work environment as well. If she wants to stay, let her. But try to get out of there OP. Hopefully good luck job hunting. And make sure not to tell your bosses you're looking for a new job!