Of course, Tracy knew what was happening. She just couldn't believe it. She had attended a small-town school where there had been the usual talk about bad girls. The bad girls allowed a boy to put his hand on her breast or feel up her thigh. It took a really degenerate girl to do what Maggie was doing.

"Oh my God," Tracy said softly.

Tracy was horrified but she couldn't make herself leave. Maggie's blonde head was moving faster and faster and the man groaned.

"That's a good girl, Maggie," he said. "Suck me. Suck right up! Ohhhhh, Maggggggie!"

The man opened his eyes and saw Tracy standing there. He gave her a smile, showing all of his white teeth. Tracy thought that he was really a vulgar-looking man. He had black hairs all over his chest and his bulging muscles gave him the look of a construction worker.

"Why hello there," he said. "Would you care to join us?"

Maggie jerked her head away and turned to look at her younger sister. Her face paled. Tracy turned her head away in disgust because she had seen a spot of white at the corner of Maggie's mouth that could only be one thing.

"Tracy," Maggie said. "What are you doing here?"

Tracy backed out of the room with her eyes tightly closed. She made it to the couch before she had to sit down. Her knees felt weak.

A few moments later Maggie and the man came out of the bedroom. The man had his clothes on so Tracy was spared the humiliation of actually seeing the place between his legs.

Maggie had a robe wrapped around her.

"Tracy," Maggie said softly. "Tracy, baby, it's not what you think."

"I saw you." Tracy said. "I know what it was." Tracy put her head in her hands and sobbed softly. She heard the front door open and now and she knew that the man had left. It was only then that she could bring herself to raise her head and look at her sister.