I'm I over reacting?

My my husband has a son from a previous relationship he had before we got married well the mother of his son decided that this covid lock down is to travel out side the US to Mexico not my business and I really don't care what she does but she decided to take her son witch again it's her choice shes the mother her responsibility but what I'm scare for is that my husband will want to pick up his son after they come back and bring him over and risk my 2 year olds health because who knows if they get covid on their way back or while they're in their stay over there im mainly scare because I'm currently 32 weeks pregnant what if my daughter gets it and I won't be able to stay and be with her because of my situation or what if I get it and I can't be with my 2 year old I haven't mentioned nothing to him I've just been thinking about it in ny head idk if I should even say something or if I'm just thinking to much ! What would you guys do ? I just don't want to come of as rude or selfish since it's his son 😒😔