Ianto was pretty much sure that the moment he did do that again, that things were pretty much going to be over between the pair of them, but just like Sulu, he couldn't care less. Sulu's hand on his thigh only furthered his resolved, and, gathering his wits about him one last time, he rocked just the right way, arching into their motion for Sulu to get the angle just right again, and if he could just... Ianto tightened his arm around Sulu's shoulders, his leg around his waist as he bent forward, his breath coming in short gasps as he tried to...there. Sulu's arousal pressed right up against that bundle of nerves, in all the right ways.

Ianto's back arched, his nails scraping at Sulu's back as he practically convulsed under the other man. He let out another moan, like the previous one but longer as he rode the wave of his orgasm. God, Sulu hadn't even touched him, and yet the climax just rolled over him, punctuated by every movement the other man made until Ianto was left lying boneless underneath him, his hand still clutching weakly at his shoulder as he panted, his eyes falling shut. "...holy Christ," Ianto said, succinctly, after a long moment.