JUY-342 My sister-in-law's defenseless post-bath, see-through bikini and tight hot pants

Because my mom, who regularly came to clean for me, was hospitalized, my house as a single dweller reached its highest level of messiness. My sister-in-law, worried about me, decided to come and clean. However, no matter how much we tidied up, there seemed to be no end, and by the time we finished, it was past her last train's departure time. The idea of spending a whole night alone with my sister-in-law is enough to make me nosebleed, but her unguarded state after taking a bath is even more stimulating…