I'm going to ask my wife to consider her obligations at home instead of visiting her sister who just gave birth.
Why do you want your wife to stay at home?
I need her here to do the housework.
You shouldn't come in between your wife and her family at this important time for them. Stop trying to dictate what your wife can and cannot do, she's entitled to visit her sister if she wants to.
Well then I will stay at home for the rest of my life and leave her to do whatever.
I believe then you should just let your wife revel in her leisure and celebrate these wonderful events. Chores can come later, and you can't force her to do that. How about going with her to visit the new baby, you might really enjoy it.