Mating yourself to an archangel was something most Alphas, even if they believed, would never have done. Hell, Sam probably wouldn't have done it if he'd been thinking straight at the time.

Doesn't regret it in the least. Just probably wouldn't have done it when he had.

It's something that Sam puts out of his mind right now, shifting his stance so that he's fucking Gabriel hard and fast, the knot large enough to be felt now but not enough to keep lock them together yet.