Grin and bare it

Here goes nothing, you say as you pull down your sweaty underwear. The sun is warm on your backside as you straighten up, your dick literally swaying in the breeze. Your face is as red as your ass is going to be if you don't get some shade--or sunscreen--soon.

"Hey, niiice," Liz says, openly ogling you. Rebecca stays quiet, though she is definitely looking. "Now hand over your underwear."

You silently hand your boxer briefs to Liz, leaving you completely exposed for all to see. You continue to sweat, not only because it's hot but also because you're very nervous. You've been naked in front of Rebecca, of course, but you didn't even know she had a sister - and now she knows quite a bit about you.

"Okay, there. Now let him in," Rebecca tells her sister. "I'll find you a towel or something," she says to you and jogs inside to grab you something to cover up with.

You start to follow, but Liz doesn't move. You prepare to slide past her in the doorway, but she puts her arm up, blocking your entry. "Not so fast," she says.

You're certain you could push past her, but you're not sure you want to pick a fight with your crush's sister. Or maybe that's precisely what I should do? you ask yourself.