I'd like to have her lying as she is in your 2nd picture (in the white see-through). I would kneel my shins over her arms to hold her down, and sit down on her chest - lowering myself forwards until my face is on her thigh.
Some stroking and teasing of her inner thighs should open her up until I can get the same view you show in the 1st picture, with those soft, delicate pussy lips on show.
While my body weight keeps her in place, I'd use the fingers of both hands to stroke, squeeze, probe, and pull the lips - opening them up and making her wriggle under me. Two fingers probing deep inside will explore while my other hand exposes her clit and starts circling round it.
Every time she starts to buck her hips to get more I'll ease off the sensations, then as she relaxes I'll start again until she's begging to cum. I'll tell her I will only stop when she begs to suck me.
As my fingers get to know her better I'll take hold of her cunt lips and pull them as far apart as I can, breathing hot then cold breaths across them and diddling her clit with my tongue. One hand will then slide round the back to squeeze those cute buttocks and tickle across her ass hole.
When I finally get tired of her PLEADING with me to let her suck my cock I'll sit on the edge of the bed (avoiding the wet patch where all her pussy juice has run out) and make her stand in front of me and bend from the waist to suck me. This means I can easily get my hands on those cute soft tits and hard nipples. As her sweet mouth slips around me I'll use these nips to pull her down as deep as I want, and then control her movement from there.
When I've enjoyed her mouth to my satisfaction, I'll slip out but make her stay in the same position while I go round behind her, slip it into her cunt, and carry on using her tits to direct her movement.
Thank you 2BCuck - I enjoyed that