Remember that her G Spot is about 2 inches inside her northern vagina wall so your penis only needs to be in this deep for you to be pressing against the g spot. You want your penis to be sliding over the g spot or pressing directly into it.
The first position is similar to missionary because she can have her legs up or down. The important things here are that: She has a pillow under her butt, the guy isn't leaning right over her. These should allow for full g spot stimulation and can make her squirt.
Second, T G Force.
Again - not too much depth, just slide the head of your penis against her vagina wall. Keeping a steady motion and rhythm.
Thirdly, the seated wheelbarrow
This position is great if you have been cumming too quickly lately. Given the positioning of the man he can't thrust at a fast rate. The woman can grind at this position as well.
