Caught jerking off while house -sitting

Every once in a while, my (37m) sister (44f) has me check on her house and pets while her family goes on vacation.

Well, a few weeks ago, I took the opportunity of being alone and not having anyone around to relieve some stress that had been building up for several weeks and not being able to get off at home because there is no alone time long enough.

I'd been flipping back and forth between reddit and PH and slowly jerking for about an hour and a half when things started to happen.

What I wasn't told was that my sister's youngest daughter (19f) didn't go with them... Also, their house has three entrances, so even though I was close to the main locked door, I couldn't hear the other door open and close over the gonewildeaudio.

To make things worse, the one I was listening to was a cousin incest story. All I hear as I'm getting close, trying to match the story, is my niece saying "well that explains some things."

Of course, I'm horrified at being caught and trying to cover, but come to find out she'd been watching for at least a full minute before saying anything... Her expression of smug satisfaction and the fact that her thighs were pressed together told me that no matter what, nothing was going to be the same.

I waddled to the nearby bathroom to recover from everything and heard her say something about finishing first, behind me, but couldn't make the rest out.

When I opened the door to leave, she was already in her room, and I could only assume that the sounds of porn from her room were deliberate teasing.

After leaving, I've kept my visits short until the rest returned. Haven't heard anything from anyone, so hopefully that is good, but I'm still just waiting for the other shoe to drop...