"Oh yeah, you'd better believe it." Sure, Sam was more stubborn than an ox and a donkey combined, but Kira was going to find a way to get them together. If there was one thing she understood, it was how guilt could ruin any chance of two people having a good, happy relationship. It didn't matter how deep Sam's guilt was, she was going to make sure it didn't get in his way, like she had let Trent do to them.
When Kara touched down, Kira let herself down carefully, perking up her senses and raising her hands into fighting position. She was so ready for this. Sam and Dean seriously needed to let her come along with them on a hunt once in a while.