Why not?

You pose in more erotic ways as Kary gets wound up. You feel a tingle deep within you each time Kary snaps another photo. You feel an internal desire to arouse your sister beyond just wanting her to stuff it into you. That itch becomes a flicker of heat as you think about modelling like this.

“If only they had pregnant men’s swimwear, I could model that for you,” you blurt out. You immediately feel stupid. You don’t know what came over you.

“We can make some if you want, bro. If that makes you feel sexy, I’m all for it! I used to make all my own clothes, remember? I can’t say I’m a top designer, but I bet I can come close to replicating almost anything you can find on the internet. With some accomodations for your state, naturally,” Kary beams.

“Let’s take a look, see what we find.”

You and Kary gather closer than necessary and start searching for...exotic...clothing designs...