Am I overreacting ?

So I have a 2 year old son and a one week old baby and my husbands been going places with his mom. Backstory: His brother tested positive for the coronavirus and his mom lives with him. My husband says she hasn’t been near him but she’s still exposed? He’s a mommy’s boy and it’s getting ridiculous. I told him he’s gonna have to do something. A) stay with his mom (because I don’t want to chance us getting it) or B) stay away from her until we know for sure she doesn’t have it and he doesn’t have it anymore. He’d rather stay with her 🤦🏼‍♀️. Am I wrong for this? It makes me so upset! He told me the other day to open the door for his brother and hand him some money to deposit because he’s busy and I flat out told him no. My husband hasn’t really been there to help me but yet he wants to spend time with his mom and was planning on going fishing with her and asked if he could bring our son... I really don’t want the kid’s near her because I feel like she’s been exposed and now my husband. He said it was government crap and they are making it look worse than it is but it’s getting ridiculous.