She's a hoarder advice?

The problem is his grandmother is hoarder. When I say hoarder I mean she has every inch of her house covered with something. Bugs everywhere and I don't know how or where she even sleeps. I never eat anything or even take my purse in the house. My poor husband always takes out the time to clean out his moms room and for the most part it's the cleanest room in the house. It breaks my heart so much to see this. I still see the occasional roach in his mothers room due to the rest of the house but he's trying. I know his mom doesn't want to be in a home either so it's just a tough terrible situation. 

Well I told him I didn't want my baby going over to her house because of how nasty it is. Which he agreed but felt terrible because that meant his mom wouldn't have a relationship with his mother like he wants. I also don't really want the grandmother and other family members that live in that house to touch the baby when she's born either. (I forgot to add his aunt and cousins live there too) I mean I can't understand how you can live in a house so filthy that only one bathroom works because everyone in that damn house is too lazy to get the others fixed so it's nasty with bugs everywhere and they leave stuff out and eat in that ugh. I do t know to communicate I just don't want them there at all, they are nice people but I don't Bugs being transported onto my child. This means alienating his mother and I don't want to do that because really she can't do anything. I don't know what to do guys. This man cleans his moms room and bathes her if he has to make sure she's ok and tries his hardest to keep stuff out. He bought her her own refrigerator and keeps it stocked and clean too which is in her room with her. He makes sure she has a nurse to come care for her daily because he can't be there everyday which think God the woman that we chose keeps everything clean there too because she also feels bad. I feel terrible I don't know what to do at, I just want to protect my baby.