These parents are control freaks who don't see their son as an adult. Unless he starts demanding that they do, I would tell my child to run as far as s/he can. Some parents just don't get that once your kids have a partner, their first allegiance is to that person, and not the parents. I know they are young, but... my in-laws expected that I would be a certain way. Call them mom and dad and call them all of the time. I had no desire to do that as I felt i already had parents. They wanted things done *their* way. DH stuck by me the whole time. We didn't talk to them for 5 years at a time and finally, moving 2,800 miles did the trick.
And, I would never ask a guest to clean the bathroom!