Disclaimer: I do not own the Transformers.
Sideswipe had never liked Starscream. He was fun to try Jet Judo on, sure, but other than that, he was just a pain in the aft.
Sideswipe had never liked Starscream, and now his hatred for the Seeker was more intense than ever. The reason? He had released a new virus he'd developed into Sunstreaker's body as a test.
"Sides?"
Sideswipe walked over to the berth where his twin lay shivering.
"Need anything?"
Sunstreaker nodded. "I need a bucket, right this instant."
Sideswipe quickly got a bucket out of the cupboard and sat Sunstreaker up. The golden warrior tensed, leant over the bucket and purged his tanks.
Sideswipe winced sympathetically, watching the stream of purplish-pink energon spurt out his brother's mouth. He reached out with his left servo and began rubbing Sunstreaker's back.
Sunstreaker paused for a klik, catching his breath. He stared down into the bucket. That energon had been inside his tanks until a moment ago. The thought was enough to make him feel like purging again.
Sideswipe forced Sunstreaker to lean over the bucket as he did just that.
"Sorry," the yellow twin gasped, upon regaining his ability to talk.
Sideswipe rubbed his twin's abdominal plates.
"It's okay, it wasn't your fault. I wouldn't blame you even if it was your fault. You're unwell, Sunstreaker, but it's okay. I'm here to protect you."
Sunstreaker lay back down, resting his helm in Sideswipe's lap.
"I love you."
"I love you too, Sunshine."
For the first time in stellar cycles, Sideswipe watched a genuine smile cross Sunstreaker's beautiful face as he drifted off into recharge.