Of course you are

You quickly stand up, swaying a bit as you do. The **** has gone to your head a bit, but that's fine. You can handle more booze than this no problem. "I'll be back in a few." you say. Alex mumbles something in response, but you're already turning to head back inside.

You make your way upstairs to Gwen's room and slip inside, then head to her dresser. Looking through her drawers, you find what you were looking for. Her swimsuits. She has more than you realized. All of them bikinis.

That would normally annoy you, given that you planned to wear one, but it would work out splendidly in this situation. You rifle through the articles, taking a few seconds to consider each one. You had the privilege and horror of seeing his reactions to Gwen in her swimsuits plenty of times before. For this to work, you'll need a good one...

"Ah ha!" you say, pulling one out. You remember seeing Alex's jaw hit the floor when he saw Gwen in it. Unfortunately, there was good reason for that. It was very attention getting. Bright pink and pretty darn skimpy. You had made a few comments to her in regard to it, in a joking manner of course, and you knew your parents would have as well if they had seen her in it.

They hadn't, of course. Gwen was careful to not let that happen.

You tossed the bikini on her bed and stripped out of your clothes. When you were naked, you took a moment to look yourself over again. Your skin was flawless, and you noted the lack of hair below your neck. The witch, or whoever, had really gone all out...

Shaking your head, you decide to get on with it. You grab the bottoms and begin sliding them on. When you reach your hips, you struggle a bit to pull them up. It seems you're curvier than Gwen. Not much, but enough to make this tougher. After a moment, you manage to slide them up You turn toward Gwen's mirror and look at yourself. You can see that the fabric of the bottom is a triangle that is pulled tight against your new mound. You can see the outline of your vagina through the fabric if you look hard enough. Turning to look at your ass, you note that it seems to be more wedged between your cheeks than it was on Gwen, making it seem more revealing than it was, which was saying something.

Shrugging, and noting that your tits wobble a bit as you make the action, you grab the top and begin pulling it on. It takes you a few minutes to figure it out, but you finally get it. And, ultimately, you find it to be a bit tight. Seems you're bigger up top as well. The top amounts to 2 tiny triangles of fabric and thin strips holding them together.

You narrow your eyes, knowing it's on but it seems unstable. You bounce on the balls of your feet a couple of times. Your breasts wobble, but don't pop free. After a few bounces, you're satisfied that you'll be decent enough. You trot back over to your clothes and grab them, pausing only when you see a small collection of hairbands on Gwen's dresser. You raise an eyebrow.

"Well, it would complete the look..." you say. Gwen always does crazy shit with her hair, and while you doubt you could emulate her, you can do something.

You grab 2 of the elastics and take another moment to tie your hair into 2 pigtails, each one hanging to your shoulders. You shake your head a couple of times, feeling them move, then nod to yourself. You grab your clothes and leave Gwen's room, tossing them into yours before heading back down.

Now that you're all dressed up, it's time to have some fun.