Push the advantage, of course

"Don't go anywhere babe, just let me finish this and I'll be good to go for round two" said the Bro who had just finished having his way with Lisa. One of the other brothers handed him a beer.

"...okay..." she replied, meekly. She glanced briefly at her sisters, blushing wildly, before looking away again in shame. She raised her hips and spread her legs again, offering herself again to the man who had so easily claimed her.

Sarah didn't know who disgusted her more; the asshole Bro who had made such a sleazy comeon, or her sister who had submitted so readily.

While she was pondering this she felt a par of firm hands grip her hips and something large and hard grind up against her ass. She gasped in shock.

"I call dibs on this one. I like the tall ones." Sarah looked back to see the Bro who had so arrogantly approached her grinning from ear to ear. He was obviously quite drunk. He honestly thinks I'm just going to bend over and let him have me, she thought. She cursed Lisa for encouraging them like that.

He really was big, though.

Maybe that was why she didn't resist when he slid his hand up to roughly grope her left breast. And maybe that was why she seemed frozen when his other hand started pushing her forward into the same unenviable position as Lisa.