all_the_way_to_the_base concept (for pony XL)

Update: I'd recomend using deeppenetration-concept-slider-for-pony-xl instead of this one. It can do most of the same poses, but with less bias on style.

trained on deepthroat where the penis isn't visible, or is barely visible, combines well with full-face blush and cum in nose

The pony XL v6 model can kinda do this already, but not reliably.

The example video, you can make it a lot more consistent by combining with style loras, or even just invoking an artists name in your prompt.