User blog comment:Tdilover7/DXG confessional kiss! Okay, people. What now?/@comment-2175239-20100816132654

Maybe she didn't regret kissing him because-and this is just a shot in the dark here- she may possibly just...like him? She's shown to have a crush on him ever since TDA and Sierra even says she's had a crush on him since season 1.

There are times when you just can't fight attraction :P. And I guess Gwen and Duncan can't fight their attraction.