It took me a while to get a mental picture of what you were talking about. Doing things exactly like you said won't work exactly. It is necessary for her to allow me to penetrate a little bit, then wait a bit, then penetrate a little more, etc. Sometimes it helps to oscillate back and forth between the farthest point we have acheived and just barely penentrating for awhile, then trying to go a little deeper, etc. If that makes any sense at all. I will say that she does say that she enjoys the process when it doesn't hurt.
Chrome
"Recollect me darlin, raise me to your lips, two undernourished egos, four rotating hips"