Perform Oral Sex

"Put that mouth of yours to work and show your brother what a mouth is suppose to do with my cock" Your uncle tells you.

"What?" You say, stunned that your uncle could give you such a command, could even speak to you in such a way. There's no way your going to do such a thing, but your collar says otherwise and you find your body beginging to move on its own.

You struggle, this is the last thing on earth you want to do, but its no use, you find yourself on your knees in front of your uncle, his boner already free and bobbing out in the open. You close your eyes as your mouth opens and you take your first cock into your pie hole.