Can my wife have health insurance through her parents and myself?

We’re married and her parents don’t know. My insurance doesn’t cover her treatment but her parents’ insurance plan for her will. Is it illegal to have health insurance for 1 person from 2 companies? And will her parents find out that she’s married with insurance if she uses their health insurance plan?

Can I reimburse myself health insurance costs from my company?

We used to have individual health insurance, and I would pay for it out of my own company (an S Corp). When we got insurance through my husband’s employer, I stopped reimbursing myself.
He is paid for by the company, and then it costs extra to add myself and our child.
I was just going to [...]