Suck her hard cock and play with her soft balls right to the point she is about to cum. Grab her swollen rod and stroke her off into a glass. Then I would add my seed and have her straddle my face with her balls laying on the tip of my tongue, at that point have her pour the full glass of delicious seman down her pulsating shaft and over her balls onto my waiting tongue. Not that I have givin it much thought.