You keep your back to the wall, good with pillow to rest your head.
The girl goes inverted, sucks your tool with her legs resting on the walls behind your head and you licking her pussy.
After a while, she comes down pushing her legs around the wall and at the same time she continues to suck your tool plus lick your balls rolling her mouth pushing the tongue to hit your tool.
And what you can do with your mouth and tongue while she comes down is up to you and your physique.
But I can guarantee u will be sweating like hell