Stiles loved the feeling of Derek’s knot when it had swollen to the point Derek had to really push it inside him. He loved the stretch, the tougher movements as they tried to continue moving as long as possible, until the knot was too big, until Stiles couldn’t stretch anymore. He loved those moments it caught, he loved the final one when they were locked together. He moaned, clinging onto Derek, his parted lips rubbing against Derek’s rough jaw.
He found himself on his back, covered by Derek’s body, his mate surrounding him protectively even as he pumped his hips again, pulling more desperate cries from Stiles as the knot inside him continued to swell, rubbing sweetly inside him, teasing his prostate until Stiles could feel another bubble of pleasure building in his belly.
Though they were closer to the betas now, they were far from Stiles’ mind. Everything was Derek. There was no room for anyone else except his mate and the child he so desperately wanted to create. Stiles felt the climax all through Derek’s body, moaning loudly as he was filled, muscles clenching as best they could around Derek’s knot as he came for a second time.
“Keep coming,” Stiles gasped, his fingers of one hand still running through Derek’s hand, the others clinging to his arm, pressing his nails into his skin. “Keep filling me. I want your pup growing in me.”
He vaguely caught the soft noises of pleasure coming from the betas on the floor beside him, but everything else, all he could hear and smell was this, the sweet scent of him and his alpha.
“My wolf,” Stiles smiled, his teeth grazing Derek’s jaw. “Want you to breed me-“ another orgasm was building up already, Stiles’ muscles fluttering around the knot inside him. “I’m so fertile, Derek. I’m so ready to carry your child. To add to our pack.” He whispered those words close to Derek’s ear. They were just for him.