Rob's jaw tightened as he got lectured about family, about giving people a chance.
"I guess you're both forgetting the other thing this family likes to do to each other. We're damn good at lying. To each other and ourselves." He knew he could fall prey to that vice.
"We're also damn good at making bad choices. I know how you two would part ways, and yeah, you always came back to each other.." Just in case either of them decided to butt in. "But, it wasn't ever the same. Distrust, anger, disgust, pain - holding a grudge is a Winchester past time."
Rob sighed. "Giving you a chance or breaking your heart? Sam wasn't even around, and I thought what they didn't know wouldn't kill them a little inside. What you didn't know wouldn't hurt you, you, Jo, Mary, Sam. Would think you'd both understand that too."
He might have lectured Mary about it, or made a comment anyway, and he would give hate himself for it later. Yet, he looked at the door.
"I'm going to go. And, you don't have to worry about saving my ass, or looking me up for my birthday." He looked at Sam. "I've looked after myself before; I'm fine with doing it now. My parents taught me how."