This pattern of theirs, both of them coming over and over, bringing each other there was really wonderful, it was incredibly sexy. Stiles loved the reactions he was getting, he loved how Derek responded to him-
He gave a soft cry when Derek rubbed deeper into him, filling him. Fuck, he was so full- maybe it was just his imagination, but he was sure he could feel more and more of Derek’s come guiding up inside him. And it felt amazing.
Stiles was blissed out and relaxed, happy to just move as Derek pleased, as long as he didn’t pull out or pull away. He hummed at the shifting and the gentle rubbing against his rim. He absolutely wasn’t expecting the tongue against his nipple-
Stiles arched up and cried out louder as sudden, brilliant pleasure rushed through him, twisting in his belly. “Oh my God, Oh my God, Derek-“ he sobbed, writhing on the bed. His nipples felt more sensitive than they had before, and they felt incredible with Derek’s tongue on them.
He could only imagine what it would feel like when he was pregnant or breast feeding, when they’d be more sensitive. He hoped Derek would enjoy them then, too-
The thought- the thought and the sensation sent another wave of pleasure pulsed through him, his muscles trembling helplessly around Derek’s knot.
"W-will you-" he started, his voice rough from his moaning. "When I'm pregnant- when I'm feeding our pups- I want you to taste me then, too-" he whispered. "Like this. The milk-" Stiles bit his lip and groaned, writhing down onto Derek again.