Ronon watches over Bruce and Logan because Sheppard asks him to do so. Bruce and Tony like having Ronon around. Smut ensues, lots of slashy smut.

"His name is Tim and I think my dick will never understand the difference between fear and arousal again."

"I don't taunt you with relationships with other men. I have relationships with other men because you leave me unfulfilled and angry and ready to punch someone in the dick."

Okay, and that was why Bruce had sidekicks. It absolutely made a person feel better about all their shitty mistakes.

"Do I look like that much of a damsel in distress to you?"

Tim and Cass (and to a lesser extent, Steph) share everything. That’s just a fact. Clothes, safe houses, gear, food, showers, toothbrushes— —and sexual partners.