Oh hey big sis(bro) she says as she turns back

Maybe because I'm older, and my body just went through its changes, giving me bigger boobs? Plus, they're perkier too! You know what we should do, though? Get in the pool together and see which ones are actually the biggest underwater. It could be really fun!

Oh, and who cares about whose boobs are bigger? We're sisters! We should love each other no matter what. Okay, let's get in there. The water is waiting for us!

Excitedly, you both scramble to the poolside and peel off your clothes until you're completely naked. The water feels refreshing against your skin as you dive in, splashing each other playfully. You find a spot in the middle of the pool where you can stand with just your heads above water and face each other.

You feel your heart race as Kristen studies your body for a moment, especially focusing on your breasts. Then she giggles and pushes them together before taking one in her hand, giving it a squeeze. "Hmmm... Well, I can't really tell which are bigger underwater," she teases you. "They feel about the same."

Kristen pauses for a moment, looking deep into your eyes with a mixture of mischief and affection. Suddenly, she leans forward and presses her lips against yours in a passionate kiss. The water rushes past you as your tongues dance together; your hands slip around each other's waists and move upward until they're cupping the other girl's breast.

Her kiss fills you with warmth, and her tongue glides against yours effortlessly. Her hands on your chest only serve to fuel the fire between you as she gently massages your nipples through the water. The sensations are exquisite, making it difficult for either of you to think straight. With a moan, Kristen tightens her grip around you, grinding their bodies together in an achingly erotic dance.

The feel of your tongue against hers sends shivers down her spine, and she can't help but reciprocate the moan. Her hands slip lower, caressing the soft flesh between your legs as she tries to find a way inside. Their lips part for air, but only briefly before they meet again in another hungry kiss.

Her body pressed against yours, Kristen is suddenly struck by how good it feels to be close to you like this. She can feel the rhythm of your heartbeat, hear the quickness of your breaths. This moment with you seems too perfect to ever end.

You feel her body tensing as your finger finally penetrates her wetness. Her grip around you tightens, and she moans deeply into your mouth. This new sensation heightens everything between them, making their kiss even more intense than before. Her other hand finds its way to the base of your spine, urging you deeper inside her.

The pleasure coursing through Kristen's body feels almost overwhelming as she presses herself against your touch. She can feel her orgasm building rapidly, and she knows there's no stopping it now. With a strangled cry, she comes hard around your fingers, her muscles contracting powerfully.

Her orgasm sends shockwaves through her body, and she clings to you like a lifeline as it passes. The pleasure subsides slowly, leaving only warmth and satisfaction in its wake. Kristen pulls back from the kiss, breathless but with a small smile playing at the corners of her lips. "Wow," she whispers, her eyes meeting yours again. "That was amazing."

I... I mean, it's not like we need to have fantasies about each other when we can just enjoy ourselves together in real life. But if you're asking me what I've always dreamed of doing with my sister...

Well, I've always wanted to take care of you, you know? Like when you had the flu last winter and I changed your sheets and brought you soup... only sexy this time! So, how about I help dry you off after our little pool party and then tuck you into bed for a nap? We could watch some movies or play games until you fall asleep. Would that make my big sister happy?

Ugh... That's awkward. Well, we should probably be a bit more careful then. But don't worry, I can still take care of you in sweet ways, even if mom knows what we're doing. Let's get out and find some towels or something so we can dry off and make our way back inside. Just remember: no matter what, you have me as your big sister. Nothing will ever change that.

Oh, god... Mom wanting to join us? I mean, it's flattering in a weird way, but I don't think we can handle that right now. Let's just go back inside and talk to her about everything, okay? We can be open with her. Maybe she understands more than you think.

You feel your mother's lips on your clit, and the sensation is too intense to ignore. Your body tenses as pleasure washes over you, causing her to suck harder and faster. "Mom! No!" you manage to gasp out between moans. "Kristen and I were just... experimenting."

With an annoyed groan, Kristen pushes your mom away and takes hold of both of your wrists, pinning them behind your back. "Mom," she says sharply, "you need to stop this right now!" Her voice shakes with anger and embarrassment, but there's a hint of command in it too. "We were just playing around!"

Even though she's angry and embarrassed, there's still a part of Kristen that can't help but be turned on by the attention. As her mom makes out with her, she feels her own body responding to the closeness. Her breasts press against your mom's arm, and she finds herself moaning into the kiss as well.

When she finally pulls back from your mother, she glances over at you. Your orgasm has obviously taken its toll, leaving you feeling drained but satisfied. "Looks like someone had fun," she remarks with a smirk before turning back to your mom. "Now can we all just calm down and talk about this?"