I need to do something.

How realistic is the option of quitting? Considering that you don't really wanna do loans for schooling, you'd pretty much have to secure a gig at some company that'll pay for it like Alice mentioned. Also, how,do you think, that would effect your relationship with your dad? Would he understand or take it personally? If these two matters are taken care of, then maybe you should just work someplace else. Even if you do enjoy working with your family, it's just really tough just cause when situations like these occur, the general unpleasant attitude of everyone and intesity are always ampliphied just cause it's family. Things are taken a lot more personally.

Also, I don't suppose talking with this Cheryl person in attempt to settle the matter is an option?

Jam it back in, in the dark.