SparkHG Incredible game and I'm not trying to nitpick, but as a suggestion, I noticed some of your insertion animations
, simply have the insertion portion, then resets to the beginning of the animation on repeat (so you seem to sort of teleport out of her and reinsert repeatedly).
I might suggest if you want it to simply be an insertion, don't use repeat (although IIRC you need to have the final frame of the animation set as a still prior to the animation ending because of the way renpy overlays video on the last still image shown).
Then you could have a little dialog/acknowledgement of the first feeling of insertion, then play the insertion animation again/ along with a reversal of images to make it a full animation from that angle before moving on for a little extra mileage.