Can't stand the smell of cat litter boxes! 😡😤

Georgia💚💙👶🏼🍼🐠🐟
Okay so I'm "babysitting" my cousin over at my aunts house like I normally do, fine, whatever. But right now I'm sitting in their small house in the living room and all I freaking smell is cat urine! A couple litter boxes look very used and the smell is so damn strong my nose is almost burning! I've been trying to take small breathing breaks outside for fresh air but every time I walk back in it feels like the smell gets worse! My cousin is 13 and is very capable of cleaning out the litter boxes but should I say something to her now or wait to pick my aunt up from work in an hour? Help please! I know I should t be cleanin litter boxes while pregnant but can this smell harm my baby?! Very concerned FTM here! Thank you!