For this position you will both need great chest area strength for everything to fall into place.
You should stand behind her and get her to kneel on all fours on the floor. Pull her butt up to your waist by reaching down and grabbing her legs when she is ready. After that, she ought to encircle you with her legs as you approach from behind.
What She Said: "This was quite a challenge, but once we were connected, I found it a real turn on entering from behind with my legs in the air. He really hit my g-spot in this position, and we both climaxed quickly, which was good because neither of us could hold the position for long! Worth trying. "—Lexi's Top Tip: If you're in this position, you should be able to use your fingers to stimulate her clitoris for a more thrilling ride.