Husband invited MIL to watch our baby against my objection

This week was the first week my husband was back at work after a 2 week paternity leave. I’ve been looking forward to the weekend bc he’ll be home to help me with our baby. I don’t need much help but him preparing meals for us and taking care of the baby while I get a solid nap is really helpful. Baby is only 17 days old so still a handful. But he asked his mom to come over this weekend and watch the baby while I nap, so he can go work in our garden. Am I being unreasonable to be annoyed by this? I do not like his mom, and will not leave my baby alone with her while I sleep. Even if I did, I wouldn’t sleep because I don’t trust her.

I feel like he only needs to do baby stuff two days/week meanwhile I’m doing it 5 days/week and 100% of the night feedings/diaper changes. I never wake him up to help bc he ‘needs his sleep’. And on the two days that he’s expected to spend more time with our baby he’s dodging the responsibility by getting his mom to do it for him. I had a baby with him, not his mom, he is my coparent, not his mom! He doesn’t really like this baby stage, he’s really just tolerating it.

Is there a different way I can look at this to not be so mad about it?