There's a reason why people say that the first time a man hits his wife, whether it's a slap, shove, or something more heavy-handed, is when she should walk out of the marriage. If it happens once, it will quite likely happen again.
I think a more clear-headed Meeta would have walked out the moment he shoved her. If Minnie hadn't been there, she could have slipped and fallen and hurt the unborn baby in the process.