We don’t let our baby stay off

My husband and I are parents to a 19 month old boy. My husband’s mother told my husband that he needs to send our son over to her house so that he can get use to staying off by himself. My husband told her no. She says that he doesn’t need to be stuck up under us all the time. And he told her no and she got an attitude and hung up. We stay next door to one another… (everyone on the block is related🙄). She comes over to see him and we never had a problem with it and we also take him next door sometimes to see her but we never leave him. We don’t leave him at anyone’s house for reasons. We are the kind of parents that we won’t make our son do something he isn’t comfortable with doing. My kid is very clingy to me and throws fits if he thinks that I’m leaving him anywhere. I think we would’ve been ok if she would’ve asked us to have him for a few hours instead of demanding that my husband brings and leaves him. We also want him to be able to talk a little before we let him stay off and eat 100% solid meals (he has a texture problem and is very picky. He eats a special diet). After she hung up on my husband… he and I talked about it and we just decided that we weren’t comfortable with it yet.

I feel like a lot of times my mother in law crosses boundaries that she shouldn’t. She more so like tells us what to do as though we are children. She’s always in our business.

I’m not even going to rant about the situation cause it’s a lot. But I’m just wondering if we are overreacting about not letting our 19 month old son stay off with anyone.