How do I explain to my husband that I do not want to share my first Mother’s Day with his mom?

Context: I am a new mom (my baby is 6 months) and my MIL moved in to help us out as we (my husband and I) both work from home. She and her husband now live with us and we’re so grateful for all that they do. She and I don’t have the greatest relationship but only because we have different personalities, besides that we get along okish. For Mother’s Day my husband mentioned that he booked us a weekend away (an hour from our house) but his mom and her husband are also coming. When I mentioned that I wasn’t too fond of her joining in on my first Mother’s Day he kept saying he can’t leave his mom at the house and “She’s my mom and it’s Mother’s Day”. I honestly feel defeated and like I can’t win at this point. I do not want to share my first Mother’s Day, point blank period. I don’t.

How do I get my husband to understand this without him feeling like I don’t appreciate what he has planned?