Worried about chihuahua


I'm nervous to bring the baby home with mine and my husband's chihuahua here. He's a good boy but VERY protective and possessive. He tries to bite my mom if she even touches me or my belly, he will punch my husband's hand away from my belly. You can't take his food or treats away because he will try to bite, even growls if you pet him while he drinks water.

I'm nervous of him coming at me while I'm holding or feeding the baby. Or if anyone else has the baby. Even nervous of him biting baby.

Any advice???