I want to tell my wife she needs to remember that she has a husband
That seems like a bad idea. Are you trying to annoy her by reminding her that she's married?
Yes, ever since her employer became my employer too
It's obvious that your wife still remembers that you are there, so it's mean to suggest that she has forgotten about you. She is probably stressed out from work, and hasn't been as attentive as usual, so you shouldn't make it worse by insulting her.
I can do whatever I want.
It sounds like you don't trust your wife, and if you act in this manner she will likely pick up on this as well. If you're concerned about her remaining faithful at her new job then maybe you need to sit down and talk to her? If not you may continue to have feelings of insecurity that could poison your relationship.