Linda could hardly believe what she'd just witnessed, but there was no mistaking the scene that now scrolled over and over in her mind's eye: her twin sister Lisa on her knees sucking their Uncle Tim's huge cock. Linda tried to sort out the kaleidoscope of emotions that swirled through her, but to no avail. She was angry at Lisa and Tim for cheating on Aunt Nicole. Their mother's sister had been so kind to the girls following the death of their parents. She also felt personally betrayed, because she and Lisa had never kept secrets from each other until now. She wondered how long her sister and Tim had been carrying on. Linda refused to acknowledge another, particular kind of rage she felt, but it was jealousy. She was incensed that Lisa might prefer Uncle Tim and his impressive manhood to her own, more delicate lovemaking. Even though Linda had told her sister she was ashamed by what they'd done the night before, she wanted to keep Lisa all to herself.
On top of these feelings, Linda had to admit that she felt something else besides: lust. The sight of her slender blonde twin sucking their uncle's fat dick had made her very aroused. Linda had been hoping that Lisa was awake and ready to listen when she got home because she had her own stunning piece of news to relate. Less than an hour earlier Linda had lost her virginity to Jason, her boyfriend, and she could still feel his semen trickling from her body. Of course that information would have to wait, after what she'd seen in Uncle Tim's bedroom. Lisa, her shy quiet twin, had a lot of explaining to do.
Linda had no idea how long she'd been sitting there when she became aware that someone was in the bathroom just outside her door. She knew it was Lisa when she heard the tinkling of her pee, so different from the sound of their uncle's vigorous stream. She heard the toilet flush, and a few moments later her sister came into room and flipped on the light. She wore only a flimsy white camisole and pink bikini panties.
"Oh!" Lisa said. "I didn't know you were here...how long have you been home?"
"Long enough."
"Wha—what do you mean?"
"Don't play stupid, Lis. I saw you. With Uncle Tim. I was looking in just when he...uh..."
Lisa's eyes grew wide as her hand flew up to cover her mouth. "Oh my god! You were spying on us?"
"I wasn't spying. When I got home I heard noise coming from Nicole and Tim's room. I just peeked in to see what was going on, and just then he..." Linda tried to think of a tactful way to express it. She couldn't. "He squirted all over your face!" she concluded.
Lisa was horrorstruck. "I can't believe you saw that."
"How could you do this to Aunt Nicole? Are you fucking him too? How long has this been going on?"
"It was just tonight, honestly. And no, I'm not fucking him. I never planned for this to happen. We had a few beers and I asked him to show me his...his penis. Because I had never seen one when it's, um, hard. Then things just got a little out of control."
"A little out of control!" Linda snorted. "It looked to me like you knew exactly what you were doing." She thought for a moment. "Just how did you know what to do? Are you sure you haven't done it before?"
"Never, I swear. I only knew what you told me about Jason, and the rest...just seem to come naturally."
"Just came naturally huh? Well you little slut." But Lisa was relieved to see her twin smile as she spoke, softening the impact of the harsh word. Linda sighed. She pulled off her sweater, then unzipped and stepped out of her skirt. "I'm tired," she said. "I'm going to bed. Lisa, will you sleep with me tonight? I have something to tell you, and I'm feeling kind of...well, I don't know what I'm feeling, exactly."
This was not an unusual request. The sisters often slept together when they felt upset or sad, which was frequently the case since their parents had been killed in a car accident a year earlier.
"Sure Lin," Lisa replied, and slipped under the covers with her sister. They snuggled together, feeling the warmth of each other's body. "What is it you want to talk about?"
There was a pause as Linda seemed to gather her thoughts. "Lis, Jason and I, we...we did it tonight."
Linda heard a sharp intake of breath. "You mean..."
"Yep. I'm not a virgin anymore."