Mikey fooling around with Donnie and Raph and like it’s fine, not strings attached, it’s just their way to blow some steam off after missions or whenever they fight and wanna say sorry. It’s quick, express pleasure to let tension go, and it’s good enough for the three of them.
That until he got his eldest brother involved and started fooling around with him too. Like, it started the same way as the other two, almost by chance, even if this time he had been looking for that chance. But with Leo was different; usually Mikey didn’t think much about his flings with his other brothers, it was a quick in-and-out-of-his-mind type situation. They loved each other, sure! But they didn’t love each other like that, they were just bros helping each other out.
And Leo— Leo took his sweet time, he made sure Mikey enjoyed it to the fullest, he kissed and caressed him with the upmost love and adoration that had Mikey blushing for days after their encounters; he held Mikey close, he had his hands roam around Mikey’s body, as if he was trying to map it in his mind, he kissed all of the freckles in Mikey’s body, and left wet trails until he reached his destination; it had Mikey going insane, in the best way possible.
To his surprise, he found he didn’t mind at all, starting to seeking him out more; Raph and Donnie understood, giving him funny looks when he told them about how he felt and just some of the way Leo behaved with him, but he didn’t care much about that, all he cared was about his eldest brother. It was consuming his every thought, even in training he sometimes was more distracted than usual. He liked to admire his brothers’ bodies while working out, but Leo seemed just so… hot. The way he moved with his katanas, the tension in his muscles and those damn thighs, ugh…
But it was fine! it didn’t had to mean anything if he found his brother hot, he certainly was, with all those traits he had. A dream, for anyone that wanted to.
And it was “fine” until one of their little encounters, with Mikey under Leo and every thrust making him feel so damn good, that Leo says “I love you—” and it’s when the world and everything stops for them, with Mikey opening his eyes when he doesn’t remember even closing them.
He sees it in Leo’s expression, the sheer panic in his eyes and how he’s trying to find a way to escape and Mikey doesn’t want him to leave, so, doing the best he can when his legs still feel like jello, lounges onto Leo when he tries to leave, pinning him against the other side of the bed, “where do you think you’re going, dude?”
And Leo, his damn Leader, is stuttering, trying to find his words but Mikey’s had enough, the words he had said minutes ago enough for him to make up his mind, and Mikey’s not great with words, not really, so he just kisses Leo deeply, borderline on starting a make out session but Leo isn’t complaining so he goes for it, not before— “I love you too, you know?” He kisses him again before his brother can say anything else.
They have something to finish, anyway. Talking stuff out can wait a bit longer.