You hear an argument

You wake on your sisters carpet and hear Megan and Heather arguing.

"Still, that was dangerous! You shouldn't have knocked him out like that!" Megan says. You sit up and see they're nose-to-nose, Heather is now shirtless, she bumps her big chest against Megans and says "what are you going to do about it?"

In an instant they wrap their arms around each other and fall to the floor. They roll around until one of them gains an advantage.