Matthias didn’t care about loyalty (or did he? He’s a possessive little creature, though he’s sure it’s more about control on his part). Usually. Has some ever had a lover or even a fling in all the time they’ve known each other? Matthias doesn’t know because he convinced himself he didn’t care what or whom Sam did. It was his life, Matthias was just along for the ride.

And got comfortable somewhere along the way.

Sam’s loyalty works out well since Matthias is a possessive thing who doesn’t play well with others. If someone else shows any interest in Sam, well, bad things were very likely to befall them.

He reached up with one hand to tangle his fingers in Sam’s hair. Even that small gesture was wildly possessive. “I’ll hold you to that.” Demons, like Fae, are very fond of their deals.