I always like to use long smooth strokes just before I cum, then as I feel the contractions in my balls start, slide smoothly all the way in and press in as hard as I can whilst I pump creamy sperm around your cervis.
I thought he must have a 12" cock, but he just put the first inch in her. I would have grabbed her by the hips and pushed her all the down. And when I cum, I always push up as far as I can. Instinct says you go all the way in to have the best chance of your sperm getting into the womb. If you cum like he did, it will all run out again