Worried about their son living alone, Mom and Dad came up to Tokyo. They ended up staying at my place, but the air conditioner was broken, making the room incredibly hot and humid. I glanced over and saw that Mom's clothes were see-through from sweat, which got me excited! Her neck and back were soaked, and her nipples were visible through her shirt! Even though I knew it was wrong, I got an erection because of Mom. Did she notice anything?
