[That was a joke, by the way. But less of a joke would be this — spoken with more gravity, in a prodding, cautious way; he's sure Peter knows about Gamora being taken as well, because his teammate would've laid it all out on the line, yeah?]

Besides, I pinky-swore to Mantis I'd help you guys get back one of your own.

I can't exactly break a pinky promise once it's set in stone.