Vulva of Two Fingers (Female Technique)

My lady lover has a fantastic way to help me come. She strokes my shaft just right, flicking the rim of my glans regularly until I am just about to cum. Then she takes her left hand and she curls the fingers almost into a fist. Actually, just until the middle finger assumes a 'C' shape. Then she parts the index and second fingers so that they look pretty much like engorged outer labia. She squirts some lube on them, then while she is stroking me she places the space between those fingers over the tip of my glans. It feels like I'm 'entering' her, and I cum right away.