I need advice fast!!!!

Okay so my husband family’s dpnl is off so they come over to our apartment to shower. I don’t have a problem with it cause they let us wash cloths when our washer stopped. But I’m 33 weeks pregnant I got to make my nursery and keep up on the house work (cleaning it ) etc. but when they come over they just leave towels everywhere, floors always soaked and use up all my expensive shampoo and then try and smoke in the bathroom and living room.... they don’t listen cause they know it bothers me but they don’t care even said it. When I tell them they not to don’t listen. So I complain to my husband and he gets shitty with me every time then we fight. But I don’t feel like I should have to clean up after people . I bust my ass scrubbing walls and floors till my feet hurt for this baby and then clean up after his family. Then he gets mad when I say they don’t need to come over to shower if they treat me this way. They think cause it’s there brother apartmentthey can do whatever they want. I don’t know how to get this under control cause when the baby comes they going to think they can just do whatever with MY KID cause it’s there “brothers” kid too. Help me need advice!!!