0.7 or above might works fine.

I think this pose is not well known enough to give it a call. And the IL might misconsider it to be mating press or missonary. It's not stable enough in my opinion. I'm newbie in training pose ,and hope someone who got well experinced can further train it.

I trained it with mmd model, so that I recommend add below in negative.

(3d:2) ,(((mating_press))),((missionary)),outline,thick_outlines,

And I got about 80% stable output with below format.

reversedmat1ng, hetero, from side, side view, implied sex,((knotting)),((ass-to-ass)),1girl,your character's prompts etc,pillow,legs_folded,arms behind head,girl ((lying on back)),break, 1boy,boy ((all fours)),((out of frame)),boy on top,domination,ass,motion_lines,upside-down