Sam didn't say anything. He was letting Heather do the talking for now. He, on the other hand, was busy surveying their surroundings. If she had something unexpectedly lurking in a corner, waiting to spring on them the second she gave warning, then Sam was going to want to make sure that he wasn't caught off guard. Gun held at his side, he examined the triangular object, instantly thinking of the symbol that Harry had told him about. And the demon. It was hard to forget that part, especially when Sam Winchester dealt with demons on a daily basis. He despised them; Ruby being the key exception of course.
Hanging cautiously behind Heather, Sam forced his gaze on the woman before them. She certainly didn't look like much, but he knew better than anyone that looks could and usually were very deceiving.
"I'm a friend," Sam said sharply, glaring at the woman from over Heather's shoulder. And that was all she needed to know.