Hunk has been noticing you distancing yourself from him lately. Of course not on purpose but it feels like it is to him. And he has also noticing Keith disappearing either with you or shortly after you. It made him suspicious. He was a little grumpy on missions ever since he noticed this coincidence. especially towards keith. He thinks Keith is trying to get it on with his partner.

what really hit his heart like a wrecking ball was the fact that you went on a mission that was supposed to take a week or more...without telling him! Shiro said it was a last minute decision but still. A heads up would be nice. But what made his blood really boil? Keith went on the mission as well. For no reason! It was a one man job so why did he go?

anyways, you eventually got back. Walking out of the red lion with Keith. The mullet head holding onto you since his leg got hurt. Shiro takes Keith inside while hunk greets you.

"What's happening between us!?" he yells. When you show confusion, he elaborates. "you keep going out with Keith on long missions or just so happened to meet up during separate missions? C'mon.." he pouts.