I guess since it's a quickie render, you're allowed to have Green Lantern's feet off the ground, rather than planted, as she plants one on the villain's jaw. She looks like she's falling backwards, but rather than lose the chance to deliver a punch, pulls the trigger and scores.
I love the mean, determined look on her face as she tosses it - that heightens the eroticism of it!
What would help even more, and I find there's a dirth of it with most deviant artists, and that's a spray of blood from the impact of the blow splitting the baddy's pretty lips, and cutting them, while at the same time, loosening teeth!
Another reality check would be for the baddy's head to be twisted cruelly to the right, in reflection of the direction of Green Lantern's fist's trajectory. That would make an excellent make work opportunity for you to show us the distorted face, and bust lips of the victim, immediately following the follow-through of the Green Lantern's punch.