Just curious do you have kids? From everything I can gather, this can cause multiple problems. As some have mentioned it can cause supply issues for the mom (which may be compensated for with pumping, but is an absolute pain). Bottles are often so easy, it can cause the baby to never latch on properly to the mom.
Ok, I didnt necessarily mean formula, it can be pumped.
It is nice for the new mother to be able to skip one feeding during the night while the husband supplies a pumped bottle. (pumping can alleviate supply issues also.)
With my first kid, when we finally did want to give a bottle, he didnt want to "latch on to the bottle", just screamed. (This transition week is also known as hell week.)
Bottom line, do what your wife say's, dont listen to me!