Wow rouge that was a scintillating post! That is so awesome, I know you've posted about this subject many, many times!
I have made women cum before much like that, in fact it the best way when you tend to shoot before they cum in other ways, like thrusting hard and fast.
As long as I keep my head pressed there firmly after I've cum and it's still fairly hard, I have had women, my last two gfs especially, be able to rock, grind and push themselves into a vaginal orgasm much like you described.
Did your husband have a proud grin on his face afterwards?
Probably not as big as yours though huh?
You may be able to get that spot from other positions, but if the ankle grabbing works stay at it! Good for you girl