I remembered to grab the cup just in time. Flicked the lid off and aimed. A hoarse grunt escaped my throat as I shot my second load of the day into the cup. At first, it came out in streams. Then it just started flowing out in a long, sticky glob, dripping into the plastic container.
It felt like the orgasm lasted for several minutes; the muscles in my groin kept contracting and that gooey liquid kept coming out of me. I kept stroking gently up and down the pulsating shaft, trying to milk out every drop, making sure it all ended up in the right place.
When I came out of my orgasmic stupor, I could hear Aunt Liz cooing:
“Oooh, good boy… good booooy!”
She laughed and smiled at me, reaching towards me for the cup. I slowly made my way towards her, stumbling a bit on the way. As soon as I was at her side, she gently took the cup from me and moved to the middle of the bed.
“Wow that’s a lot…” she said, looking at it. “I wish Ted could make amounts like that…”
As I stood there, my head started to clear. I suddenly realized how unreal it was for me to be standing here with my throbbing cock standing straight out, long strands of juices still dripping from it. And there she was, my naked aunt, receiving a relative’s semen while her husband was away.
What happened next felt even more surreal. Liz reached in the basket on her bed and picked out a small plastic syringe with a long, thin tube attached. Then she took both plastic cups, poured the contents from one into the other, and dipped the tube into the full one. With dexterous fingers, she made the syringe suck up my fluids from the cup. Then she lay back, inserted the tube and pushed it in.
I could see her naked pussy, swollen and glistening with female juices. Seeing that plastic tube going inside her seemed so weird; both sexy and clinical at the same time. Then she started pushing the piston on the syringe and I could see the sticky goo moving through the tube, disappearing inside her. I swallowed a lump in my throat. My aunt was inseminating herself. With my semen.
“I can’t believe that’s my semen going into you right now…”
Liz looked at me with a wide smile. Her eyes were glazed and she was breathing heavily, but seemed coherent.
“I know… It feels nice… Sticky and slippery… but it feels so right, getting it inside me…”
She withdrew the tube once it was empty, and put the syringe away. Then she started touching herself again. She also picked up her vibrator. Before she started doing anything more, she looked up at me.
“Ehm… I guess… you should go now…”
“Uh… yeah. Yeah, I’ll… see myself out…”
Of course. The job was done. I should go home. It felt like a sudden, cold shower to hear her say that, though. It was as if I had been the life of the party, then everybody suddenly decided I should be kicked out because I was making everything too much fun. But yes, it was what we had agreed, after all. There was never supposed to be anything else happening.
I wandered over to the dresser and grabbed my pants; I was still buck naked from the waist down, waddling around with my half-stiff cock dangling in plain view. I made my way to the door, thinking I’d wash up and get dressed in the bathroom.
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