My brother and nephew ALWAYS say sexist woman jokes?

[SonjaJohansen]

First of all, my brother is 27, and not married. He has had the same girlfriend for a couple of years though.. and my nephew who is 16, (a couple of months younger than me) always hangs out with my brother, and looks up to him.. and everything my brother does or says rubs off on my nephew. My nephew lives with me and my parents, along with the rest of his family. The problem is that my brother isn't really a good person to look up to. whenever I'm around the two, they the kind of "gang up" on me and say woman jokes and crap. and at first, i didn't think it was too bad, and even laughed at some of them.. but now they just make me mad. they're getting old and annoying. And because my nephew lives with me, I get to hear them al the time! "go make me a sammich" "why aren't you in the kitchen?" I just want to slap him. It's not funny anymore.... And it's like he has lost all respect for me because I'm a girl? almost everything I do, it's like I'm doing it wrong because I'm a "helpless woman". I have not done anything to try to offend my nephew ever... I try to be a good aunt, and ask him how he's doing, listens to him etc. We used to be good buddies, but now he's just.. a jerk. And it makes me so sad.... What do you suggest I do? does anyone have any good comebacks to woman jokes that I could use? I feel like he might just blow it off if I tell him how those jokes are getting old, and that he's just become a jerk. All answers are greatly appreciated. Have a nice day