She wants her partner to masturbate her with three fingers: two go into the pussy, one into ass. This method can be used to increase sexual stimulation as the pressure on the vaginal wall increases.

Rosy part of ice cream represents pussy (“pinky”), brown one represents ass (“stinky”).

The middle yellowish layer is most likely vanilla, she has no marks there because she wants to highlight she wants to get kinky (not “vanilla” sex, i.e. regular penetration without anything special)