Throughout the story, there are a number of options regarding how you "finish" after a blow job.
Facial
Tits
Body
Mouth
This is one of my active investigations now. Too early to be definitive, but I can confirm these have impacts on the story.
Tits do, indeed, focus the story on tits, whether through making Allison more interested in surgery, or seemingly by making them grow via magic.
Facial seems to move women in a "cumslut" direction.
Mouth I'm less clear on; maybe just increases their libido?
Body I think (maybe) is identical to just cumming inside them, which I think (maybe) is either the neutral option or pushes your character's priorities towards control over sex.
