I'm a full-time salaried employee for Company A, contracted out to Company B (I am not considered an employee of Company B, though I work in their office).
The end of the year is coming, and I have a lot of PTO days accrued that will not roll over to next year. So, I put in a request for paid time off over the Thanksgiving and Christmas holidays to make sure I use them. My manager at Company A was ok with this, but one of the account managers that deals with Company B came back to me and said that, since the contract with Company B says Company A will bill them for 40 hour weeks, it'd be preferred that I make up the time I'd be missing while on vacation either before I go or when I get back (no additional compensation for that additional time, of course).
I love both companies and I don't want to cheat anyone, but I don't feel like this is fair to me. How can I address this request in a way that does not force me to work these extra hours?