Would you allow your child to go into a house full of fleas?

So my boyfriend’s grandparents are cat hoarders (I’m not going to get into detail with that issue it’s sad but a whole other discussion) and their house is infested with fleas. Their house has this STRONG odor of cat spray, litter, pee, and things of that nature. I stopped going there when I was pregnant because of many reasons along with morning sickness, when my boyfriend came from their house I could smell it on him and 🤢🤢🤢🤮. Okay so back to my point. We have a 6 month old, and we are going to be moving back to the same state as the family. The grandparents never met their great grandkid before (our son). I’m sure they expect us to bring our son over to their house.... I personally feel iffy about it and have addressed my concerns with my boyfriend. I know his grandparents are old and on dialysis but they are able to move around outside of the house. I would prefer they just meet our son at other family member houses (they all live close to one another). I feel like that comes off as snobby or picky? I’m just trying to look out for my son... If I don’t feel comfortable being in there why have our baby in there.. My boyfriend thinks it’s not the biggest deal (he grew up in that environment btw) and said he could just carry our son the whole time he won’t be on any furniture or the floor of course. I’m not trying to make a situation bigger than it really is with his family. I really don’t want drama but my kid will always come first. His family has a tendency to be very problematic and make drama out of anything. Advice please mother to mother? ❤️😭 Thank you in advance.

*** Also!! Any advice on the drama afterwards as well??? I just feel like there’s gonna be drama if I say no which I most likely will anyways to our baby boy going into a house in that condition.. ***