Family Ties/Ask her to model her bikini for you.
Bigstudlooking: So you bought yourself a new bikini for your trip tomorrow?
Hottyheather: Well yes and no. My mom thought it would be cute if me, my little sister and her had matching swimsuits for the trip. I wasn't too keen on matching them but I really wanted a new bikini so I talked her into one I wanted and one she could find matches to in the right size. So I guess everybody is happy.
Bigstudlooking: I Bet you look amazing in it, I am jealous of the guys at the beach who get to see you strutting around in it!
Hottyheather: Well.., I guess I could fix that, it would be nice to get a man's opinion before I wear it out in public.
Before you can type another word, Heather pushes herself back from the computer and gets up, walking out of view of the lens. It's obvious that Heather is getting more and more comfortable with you seeing her in less and less. Eventually, she returns wearing the skimpy garment, making an adjustment or two in front of the camera, offering you a quick and likely unintended glimpse of her nipples before standing in a model pose for your inspection. The pink bikini is tight and does a great job of accentuating her breasts and ass, not leaving too much to the imagination as the suit appears to be a size too small. You're actually surprised that your rather conservative mother agreed to purchase such a revealing piece of clothing. Heather walks toward the camera and leans over the desk to type, her large tits hanging down right in front of the lens, covering your screen, causing your cock to jerk in your hand.
Hottyheather: Well what do you think.., how do I look?
Bigstudlooking: You look amazing! I wish I was standing in the room with you; I’d take off my pants and show you my cock. You wouldn’t have to ask how sexy you look after you see how hard my cock is!
Hottyheather: I think somebody is horny. Are you thinking about fucking my hot little body?
Heather then moves back from the desk and rubs her hands up and down her body, cupping her tits teasingly as she awaits your typed response.
Bigstudlooking:I'm not just thinking about fucking your hot little body. I am also thinking about fucking your big tits and feeding you my hard cock. Then we can fuck!
Heather stares at the cam and makes a move with her hands like she is going to yank the bikini top down and give you a good view of her tits. Just as the material is about to pulled away to show you her nipples, a giggling smile comes across her face and she darts out of view of the cam. Ah, fuck! Damnit! you think to yourself, disappointed in just how close you had gotten in your first real sexual interaction with your big sister. A few moments later, Heather returns to her chair, back in her sleeping shirt, as she starts to type again. Her face is slightly red from blushing, likely after realizing how close she got to giving you an impromptu strip show.
Hottyheather: Well that was certainly hot.., what now
Heather has a sort of naughty smile on her face, pushing her arms together, accentuating her large breasts, giving her arms a shake to make them jiggle for you. This is going way better then you could have expected. Maybe you should try pushing your luck.