He starts whimpering sweet nothings to you, leaning down as he thrusts to tell you that he loves you, and that there will never be anyone else that he loves except for you. He tells you you’ll live together in Alphys’ lab, and he’ll even get his “idiot producers” to write you into his shows. He wants to do everything with you. You’re partners, lovers, and most importantly, an inseparable pair kept together by a deep love. His breath starts to become labored.
He thrusts harder, and faster. You cry out for him, and he does the same for you. He leans down and kisses you passionately until you both come to your release. He lays on top of you for a moment, panting, exhausted to the point of being lazy. He leans back a bit, his messy hair in his face as he puts a hand against your face once more.
You’re his, and his alone. And he’s never felt so lucky before in his entire existence.