Summary: This is an AU. Buffy has an older sister named Stacy. When Spike moves to town, Stacy sees him as her knight in shining armor. But when he falls for the younger Buffy, there's going to be hell in the Summers' home. Stacy hatches a plan to win Spike back and get rid of her sister...for good.

Disclaimer: I don't any of the characters. Well except Stacy. She's all mine, the rest belong to Joss Whedon who is a god.

Rating: PG-13

Pairing: Buffy/Spike

Buffy walked in the house and shut the door behind her, taking a minute to digest what had just happened. 'Is this what love feels like?' she thought.

"Ohmigosh, tell me everything that happened." Willow said running up to her. "In details. Spill girl!"

"It was nice." Buffy replied, a smile spreading across her face. "It was really nice. He was such a gentleman the whole time."

"Niblet!" Dawn yelled as she ran through the hall and into the kitchen.

"She's been doing that ever since you got home." Willow said looking over her shoulder at the sugared up little girl. "What's with 'Niblet'?"

"Oh," Buffy said with a small chuckle. "Spike.he said that Dawn was just a Niblet, and I guess she sort of adopted it as her new nickname."

"It sounds like you had a perfect time." Willow said as she and Buffy walked up to her room, Dawn in tail.

"Almost." Buffy said as she shut her bedroom door behind her. Willow and Dawn were situated on the bed when she turned around, all ears on her.

"What do you mean almost?" Willow asked. "Buffy what happened?"

"Stacy.she saw me there with Spike."

"So? What's the big?" Willow asked.

"See that's what I don't get. She said that she had staked a claim on Spike and that I better not try anything tonight. She was acting so Blair Witch like."

"She staked a claim on him? Since when can we claim guys? Was there a memo that I missed?" Willow asked sarcastically.

"The problem is," Buffy suddenly realized that her younger sister was still in the room, and didn't want her to hear this. "Umm.Dawn would you please get me a drink?"

"Why?" Dawn asked jumping up and down on the bed.

"Because my throat tickles," Buffy said faking a cough.

"I wanna stay here with you!" Dawn shouted.

"Please, Dawnie?" Buffy pleaded, again faking a cough.

"I'm not Dawnie anymore." The little girl laughed.

"Sorry." Buffy said with a giggle. "Niblet will you please get me a drink." The youngest Summers bounded out the door laughing and shouting the whole way. Buffy shut the door behind her. "Geez, how much sugar did you give her?"

"What were you saying about Stacy?" Willow asked intrigued.

Buffy shut the door to make sure that Dawn couldn't hear her. "She cornered me in the Bronze. She told me to stay away from Spike, that he was hers. I seriously.I think she would actually try to hurt me."

"What?" Willow asked again in disbelief.

"I know it sounds weird, but I think she might try to hurt me Willow. You don't know my sister." Buffy was wringing her hands. It was amazing how quickly she had gone from excited to nervous/scared.

"But it's not like she's ever hurt you before?" Willow looked at Buffy who gave her a nervous look back. "I mean not seriously? Right?" Buffy continued to give Willow a look. "Oh my God, Buffy what happened?"

"It was years ago." Buffy said walking over to the window and looking out longingly. "I mean I could have only been around 4 or 5. Dawn wasn't even born yet. Stacy was about 10, and I guess my parents thought she was responsible enough to take care of me."

"What happened?"

"Well my parents went out for the night. Stacy and I were home alone, and she decided to make dinner. I guess she thought she knew how to cook." Buffy walked away from the window and sat herself down on the bed. "She walked away from the stove for a minute and something, I'm not sure what, caught on fire. It spread fast and soon the entire kitchen was on fire. Stacy freaked, and started yelling. For some reason I was thinking clearly and dialed 911. They got there and put out the fire."

"Oh my God. Buffy that's horrible. But why would that make Stacy hate you? I mean you saved both your lives." Willow said.

"Well see once they called my parents and they got home, the firefighters told them that it was me who called. My parents decided that Stacy wasn't mature enough to be left alone anymore. They grounded her for 3 months and she wasn't allowed to stay home alone until she was 17." Buffy looked up at Willow. The redhead was staring at her with disbelief in her eyes. "She said I ruined her life. That I was mom and dad's favorite."

"It all seems pretty childish to me." Willow said trying to back up her best friend. "You didn't ruin her life. So, okay, maybe you dismantled it a little, but ruined?"

Buffy suppressed a laugh. "Thanks Will. And thanks for watching Dawnie tonight."

"It's no big." Willow said gathering the few books she had brought and stuffed them back into her book bag. "She's a really good kid, and it gave me some time to do my homework."

"We are talking about the same Dawn right?" Buffy asked. As if on cue the wild little girl in question came bounding into the room with a can of soda.

"Here Buffy." She said thrusting the can at her sister.

"Thanks.Niblet." Buffy said taking the can and setting it on her nightstand.

"Well I'll talk to you tomorrow," Willow said throwing the book bag over her shoulder. "Bye Daw.Niblet." She said waving to Dawn.

Buffy walked Willow downstairs and to the door. Willow reached for the door handle when the door shot opened and almost hit her. In charged Buffy's older sister, Stacy. She charged up the steps and slammed her door at the top.

"Good luck," Willow said as she stepped out the door.

"I'm gonna need it." Buffy said more to herself than to anyone else.