Sam was glad he couldn't read Dean's mind. Because the thought of "knocking up a chick" would have made him feel like vomiting. And he felt bad enough as it is. But they hadn't bothered with birth control, hell they hadn't even thought about it after what they'd been through right before their first sexual encounter.
"I don't know what to feel, Dean. She...she shouldn't be able to...I mean even though she thought she was cured when we'd slept together the first time, she wasn't so...how???" he asked, as he started to pace, his worry coming back full force.