[It takes a minute for Mikey to catch his breath but eventually he sighs and leans against his brother.]
You're the worst.
[Even if he says this, it's affectionate and with a smile.]
Other options:
no subject
[It takes a minute for Mikey to catch his breath but eventually he sighs and leans against his brother.]
You're the worst.
[Even if he says this, it's affectionate and with a smile.]
no subject
[He lets Mikey lean there, for once in what feels like it's been the longest time, not feeling like he's got some invisible weight sitting on his shoulders or on his chest.
Things will be all right...]