[peter does smile, just a little, when isaac leans in, because why the hell not? it's worth smiling about. he hums a soft sound and lifts a hand to slide it into isaac's hair, his thumb coming to rest gentle just in front of his ear. he licks isaac's lower lip, lets his teeth drag lightly over it. peter likes kissing, likes the closeness and taste and rhythm of it, and he moves closer to isaac but he's not in any rush to push for more.]
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