(Sorry this took me a bit of time, guys. I had a few IRL issues to deal with. I'm back now!)
Jeffrey was absolutely lost within the throes of pleasure as he felt his sisters egg him on towards ejaculation, something that he knew he couldn't keep up for very much longer with the way that Willow was using her breasts and his rear and her hand on his balls while the sounds that Jamie were making was something along the lines of the dreaded coup de grace that he needed to fly right over the edge.
His eyes were tightly shut at this point and his teeth were bared and gritted shut as his and Jamie's hips kept connecting into each other at a blistering pace, and his breath was getting extremely ragged. Even his meat was bulging out widely within the slickened walls of her insides, trying to fend off being squeezed into submission.
And yet, When Jeffrey's body hit that nirvana; that magic moment, his body just could not hold back anymore. Finally, after a few minutes more, Jeffrey unleashed a furious amount of his seed within Jamie's body, pumping every last bit of it inside of her up to the point where it overflowed and caused a slight amount of it to flood out with his cock still inside of her. Fearing that he would fill her up too much, Jeffrey wanted to pull out and just let the rest of it out onto the bed, but he couldn't really do much with Willow still laying on him. In the end, it would be a good thirty seconds before Jeffrey would finally stop cumming so rapidly and so furiously, eventually collapsing on top of Jamie in an exhausted heap.