Taking this to the fullest extreme she may fully sit flat by moving her feet up as far as possible towards his shoulders. Some loss of stability happens when you do this, so guys make sure you spot her! Ladies should also be careful when resting their full weight on him, & or grinding in. One false move & the fun will be over & he will be in pain! Slightly acrobatic but fun never the less.
Fun but no real movement!
Fun, you can also grab her ankles and spread her leg for a little variation.
