Panties.

Before she even realized what was happening, her arms and legs had been grabbed.

She thrashed as she felt a pair of hands, grab her panties. Fortunately, the two boys holding her legs had them spread, preventing her panties from going very far. Unfortunately, the wet material gave out, and her panties tore off.

Her ass and hairless vagina were now out in the open for everyone to see, and the situation was only made worse by her legs being held open.