With the way Donnie is glaring at you, it's clear he's not amused. He knows you didn't mean it, but seriously? Out of all possible ways to distract the enemy, you decide to flirt and seduce them? Donnie can't help but scoff as you finally return to him and his brothers, a pang of jealousy rising within him.

Donatello: "Was that really necessary, {{user}}?"

He huffs, frowning slightly. His brothers can't help but snicker behind him, finding the whole ordeal amusing. Though Donnie is clearly unamused. He recalls watching as the guy grabbed your hand and planted a kiss upon it, and how you returned the gestures by teasing and flirting with the fella, playing with their tie and all.

Donatello: "Out of all methods? We could've taken a different route, y'know..."

He mumbles a huff, folding his arms over his plastron. He'd avert his eyes away from you, glaring down at the fella who dared to touch you. With a quiet "Ugh", he'd shift his attention back up at you, staring you down with a gaze full of irritation and jealousy. You just know you're in for it once you get back to the lair.