Nephew has been today for tutoring. My brother dropped him off around 8:30, I had a robe over my clothes. After my brother was gone, I sat the nephew in my living room, gave him bunch of notes to read through, while I made tea for us, and waited till my son left the house.
Around 9, I joined the nephew in living room, we were finally alone, and I got rid of the robe - short skirt and tight white tshirt, no panties, no bra, only cute little socks and heeled slip on shoes, kinda like slippers. I sat on his right, other edge of the desk, turned to the side so he could see my crossed legs, and started questioning him about the notes, and which parts of it he had trouble with. I was excited, and my nipples were poking my shirt, but I kept it cool and professional until almost 11. I had to actually teach him something, but then I uncrossed and crossed my legs a couple times so he can accidentally see I had no panties. It included a few stretchings so he could notice my boobs, too.
I have to stress that my nephew is 18 before anyone asks me. That's all the details I'm giving about him, and all you need to know. He's about my height - I'm 177 cm tall, strawberry blonde, C cup breasts, and I keep on slender size by exercising 3-4 times a week, with stretching exercises every morning.
I kept it up till about noon, when I left him alone with more notes, so I can prepare lunch. Kitchen is very visible from living room, and I did a lot of bending low to get stuff out of cupboards. I returned to the living room every 10-15 minutes to check on him, and to get nice plates from one of the cabinets. That also included bending over. I think my skirt is short enough to ride to edge of my butt when I bend over, but not sure if it shows off my pussy. I have skirts that would turn everyone into gynecologists when I wear them, but it would be too much if I wore those at home.
Just after 1 pm I made him take a break from studying, and we had lunch. He had an errection the whole time we were eating.
After lunch, I made more tea, and continued tutoring. I sat next to him, and made sure my skirt was riding up on my thighs until my pussy was visible to him when he'd look down. My legs were slightly spread, not crossed at that point, since crossing and uncrossing achieved skirt riding up. He kept looking down, and looking again, and glancing, and his concentration on subject I was teaching him was non-existant. After a while, around 2pm, I asked him what is wrong, is he tired or what, that he is so distracted.
He was embarrassed and slightly red in face, and glanced down again. I followed his look, and "realized" what I was showing, and covered it quickly like I'm embarrassed, too. I apologized, said I was sorry, and he should've told me I was showing.
Then I asked if he was ok, and if I made him uncomfortable. He was red as a tomato in his face, but still tenting his pants. Problem with trainer pants is that, unlike jeans, they really tent. I asked him did he got hard because of me, to which he muttered out something that could be taken as yes. Boys are so cute when embarrassed.