What would you do? Thanksgiving…

My baby is 8 months old. Had rsv at about 6 months old… it was scary. I’m nervous about being with my husband’s family tomorrow for thanksgiving they are coming from out of state… my nephew just had a fever the other day and is 6 and always in my baby’s face…. His parents are very laxed and don’t mind if their kids are sick and in my baby’s face. Also my husband has a 13 year old cousin who likes to be around babies and she is meeting my son for the first time. She is petite and i don’t really trust a 13 year old carrying my son. Is that rude? How to go about this all? My son is strong and moves a lot I don’t want him to get hurt. Thanks