That it was Yussa's choice to put himself in this position makes it very much not Caleb's problem if he must swallow his pride if it turns out he can't maintain it. That smack seems to have had the effect of eliminating his willfulness for the moment, just as he'd similarly grown docile earlier. Caleb will certainly remember that.

This position is perhaps not quite as ideal for his own plans as having Yussa lay on his belly, but it still works very well, which makes challenging Yussa to live with the consequences of his brattishness more than worthwhile.

Caleb widens his own stance to brace himself at a steady center of gravity on the bed, walking back far enough that the angle when he bends to meet Yussa's backside is comfortable. Both hands squeeze the round cheeks of his ass and spread them, and Caleb's tongue wets his lips as he takes in the sight of his own come dripping sluggishly from his lover's well-fucked hole. Of course he leans down the rest of the way and drags the flat of his tongue over his rim to lap it up. How could he do anything else?