"Hey, you!" a voice called behind Marty, who was walking through the crowded casino. His face turned white as he saw the three sleezy friends of Biff's standing behind him with big smirks on their faces.
"Well, well. Look who it is," the short one with glasses whined. "Welcome home." Marty backed up.
"Where's Biff?" Marty asked plainly.
"What, you got amnesia?" the thin blond one said snidely. "He's upstairs like he always is." Marty went straight for the stairs, followed by the three men snickering behind him. He wondered what they were laughing at. He stopped at the top, having no idea of where to go, but luckily, the three men roughly passed him. Marty jogged to keep up with them. They passed through a security door into a large room which seemed to be a living room. Photos of Biff with various celebrities and public officials draped the living room walls. There were four doors that seemed to lead to other rooms. The men walked over to one of the doors.
"Hey, boss!" the short one hollered into the room, which from afar appeared to be a spacious bedroom.
"I'm busy!" Biff's gruff voice called. Marty swore he heard a woman's giggles from inside.

"Your son's here!" the short man answered back. Marty jerked his head wildly towards the man.
"Son! What do you mean, son!" Marty exclaimed. The tall buff man who was wearing a cowboy hat and boots laughed to himself.
"He's been gone so long, he's forgotten. Heh heh." Biff walked out of the room in a neatly pressed black suit, probably bought from Barney's, his hair caked with so much gel that it dripped down the side of his ear. His smug, conceited expression was the only thing familiar about him. He walked over to Marty angrily.
"You're supposed to be in Switzerland, you little son of a bitch!" Marty mouth dropped. This is a bad dream, he told himself. This can't be happening.
"Did you get thrown out of another boarding school?" Biff asked furiously. Marty was at a loss for words. Biff walked away impatiently, plopping down on one of the couches. "I'm not giving you any money, so don't even bother asking," he said, reaching for the remote.
The three men plopped down in the corner sofa, muttering to themselves. Marty walked cautiously over to Biff, scanning his surroundings. This was a different room than last time. It wasn't as flashy, but still had an aura of superiority and grandiosity to it. Marty stared aimlessly at Biff, who was watching an old western on the television. Biff finally looked up as he felt Marty staring.

"What!" Biff screamed.
"You're my father?" Marty gulped out, his eyes wide in surprise.
"Don't remind me," Biff muttered, looking back at the television.
"Where's mom?" Marty asked. Biff looked confused and started to grow angry. The three men looked at Marty anxiously, as if they knew this question would enrage Biff. Biff went to say something but was interrupted by the front door slamming open. In walked a female teenager with medium length, dark auburn brown hair. She wore ripped up jeans and a white t-shirt, and was listening to a walkman with her headphones. Biff suddenly jumped up.
"Where the hell have you been?" Biff asked forcefully. The girl didn't look up, but went walking to one of the other rooms. The tall buff man looked her up and down slimely, as if appraising a piece of meat. Biff hurridely went over to the girl and grabbed her arm roughly.
"Crystal, I'm talking to you!" Biff screamed. Crystal jerked her head up. She took off her headphones involuntary, letting out a long sigh.
"What?" she asked with an attitude.

"I said, where the hell have you been?" Biff repeated. Crystal casually shook her head, as if bored.
"I went to the mall," she simply said, going to walk away. Biff held her there.
"I need you to work in the casino, now! Get going," Biff said roughly, letting her go and walking away.
"I'm not even seventeen yet, Dad," she complained. "Why..." She stopped suddenly as she spotted Marty, standing there motionless by the sofas.
"Marty," she acknowledged softly, looking very surprised. Biff glanced uninterestedly towards Marty.
"Oh, yeah, your brother's back. Now get to work." Marty looked over at this girl. His sister! Crystal stared at Biff, frustrated.
"I'm not going," she said a little hesitantly. Biff looked up, taken aback.
"What did you say?" he asked, the tension in his voice growing. The three men eyed each other anxiously again.
"I said, I'm not working for you anymore. You're going to have to pay me," she said, her voice cracking as if nervous to challenge him. Biff inhaled angrily, walking over to her.
"You think you're hot shit, huh? You better remember your place, girl." He walked right up to her, his eyes blazing. She looked him straight in the eye.
"What place! You make me work in your sleazy casino all night with your pervert friends to earn my keep!" she answered loudly.

"I'm your father and you'll do as I say!" Biff screamed.
"Screw you!" the girl hollered back. Biff suddenly backslapped her hard across the face. The blow sent her crashing to the floor.
"You son of a bitch!" Marty screamed at Biff, going to tackle him but the three men immediately grabbed him and held him back. Biff didn't miss a beat.
"You wanna try saying that to me again, huh!" Biff stood over her, his fist out, ready to punch her.
"Leave her alone!" Marty pleaded angrily, trying to fight out of the men's grips. Biff looked up at Marty. He snickered, as if impressed by Marty's statement. He took a breath and looked back down at Crystal, who was giving him a resentful look.
"Go to your room right now. I'll deal with you later!" He screamed through gritted teeth. Crystal jumped up and walked quickly to one of the rooms, slamming the door behind her. Biff walked over to Marty, who was still in the men's grasps.
"Let's get one thing straight," he said in a deep, stern voice. "I'm in charge here. Don't ever talk to me like that again!" Marty looked back at him angrily, holding his tongue. Biff grinned at Marty's rage-filled eyes. He gave a nod to the men to let him go. Marty pushed out of the grip.
"I'm going to smooze the guests. Get out of my sight," he said harshly to Marty, walking out. The snickering men followed behind him, leaving a bewildered Marty standing there alone.