Ariana's initial good path sex scene was missing the effect for the fertility potion. I fixed it for the next update. Re-playing the scene from the CG room should give you the effect though.
Replace this file in the www/data folder to fix the bug in the bakery: https://mega.nz/file/z9JUELSa#mUgoZdj6WP4ZPkIxese6Q5SQL6ipa-herrRwzXfGjto