Well, you're going to get paid one way or another IMO, so yes they better pay you. If not, easy answer is you're going to overnight, and then they get to pay hotel, then also you'll lose XXX hours off your 8 for that next day. I completely agree that at that point, it is up to you as the pilot whether or not to continue on after the 14hrs as a Part 91 flight. As part of this, I do extend my 10hrs of required rest in the previous 24 from the time I get home though.
BTW, always calculate the return leg times towards your 8 in 24 rule. My boss tried doing that to me, but I'd say look, in the last rotating 24hrs I flew XXX and that puts me 1-3hrs over. Sometimes it sucked because I was well rested, but I've also had times where it's protected me.
In the end it's always about CYA(Cover your ___)
Love the avatar btw, nice work!