I have a younger brother who is 4 years younger than me. We used to share a same room and bed. He was cute and quiet type. Whatever work i tell him to do, he does. He arranges our room whenever our mom tells us to clean. This happened when I was 19 and he was around 15. I had developed good body and breasts. Since we share the same bed, we have seen each other naked a lot of times even when i was 19. I never used to feel uncomfortable with my body around my brother. I sometimes used to pull his shorts down, he would be naked and embarassed and i used to laugh at him.
Sometimes i would also allow him to see me naked. Like sometimes when i play outside sports or do a lot of running, my whole body would pain. I would return home have a shower and tell my brother to massage my legs and back. I rarely wear any inners when I’m in my room, so i would wear a loose shirt and shorts. While massaging my thighs, my shorts would be loose so he would peep between my legs through the shorts and look, also he would tell me to pull up my shirt and lay down to massage the back. He would be massaging my back as i laid down and try to look at my boobs and try to massage my side boob. At the end he could get the full view of my boobs. He would give me the best massage and my pain wo go away so he deserves it.