This is from a couple of years ago.
I was having a pretend sickie day, lying on top of the covers, my girl had brought tea and toast up, leaving the door open and then went on to bring the kid to school. Browsing away on the ipad visiting some colourful sites, when I heard noises from the bedroom across the hall.
My GF sister was staying with us for a couple of weeks that Spring, realised I could switch the ipad to camera mode, and watch the screen eyes down, pretending to browse and yet still see from the end of the bed, across the hall and to the bedroom door.
I decided I would flash her, and see what her reaction would be.
So me lying on the bed, in loose bed shorts, quickly arranged myself, so my bits were not adequately covered.
I had a bit of a chub on from the previous browsing, but wasn't hard, more looking impressive, like I was a good 'show' er, and god knows what size 'grow' er, still hanging down, so she wouldn't be suspicious. Pillow on my lap, ipad clearly visible so she would know I was reading, and wouldn't be looking up to see her reaction.
Anyway, out of the bedroom she comes, spots me, says 'morning' or some such, then asks how I feel, as she had heard I was unwell.
I am watching in the screen for any reaction, and halfway through her question, I see her eyes go wide, and eyebrows raise as she clearly spots it.
Her eyes immediately dart up to my face, which is still looking down into the angled screen on the pillow, I pretend to be flicking a finger up and down the screen as if browsing.
She looks down again, then up, as I answer her, starting a conversation, I briefly look her in the face and eyes, before going back to the screen, while continuing to chat. She chats on, coming into the room, continually glancing up at my face, which remains down in the screen.
She sits at the end of the bed, dong and balls in full view, as she is talking to me, she is just staring at it. It was remarkably difficult not to sprout into full boner, but I didn't want her to know I was watching her look. My heart was getting faster and faster as the conversation progressed. After a time she seemed reassurred that I had no idea I was on display, she fumbled with her phone, and must have snapped a shot.
I nearly erupted at that, but she left to go and have her shower.
Heart so fast, I lasted exactly 2 strokes after she walked off before becoming a gloop fountain!
She took the longest shower I have ever known her to take, so I am going to assume she enjoyed it also.