You can change it with the Universal Renpy Mod (URM) linked in my signature.
Once you have downloaded and installed it, launch the game and load your save.
Then open the mod with this icon
View attachment 5125151
It should open on the search tab of the mod, if not, it's the first tab on the left.
For the next steps I'll add a screenshot with numbered arrows to help guide you.
View attachment 5125183
Click on the search type button (arrow #1), then switch the search type to "Value" (arrow #2)
Then in the search bar (arrow #3), type the value we are looking for, in your case it is "sex educator" (don't use quotation marks) and press enter.
It should find the 4 entries you can see on the bottom left of the screenshot.
Then you will need to click on one of the buttons shown by arrow #4 (for you those buttons will be called "sex educator"), it will open a window to change the value, replace "sex educator" with "Dad" or whatever else you want and press enter.
Do the same for the other one.
And voila, you can close the mod window.
Be careful, if you rollback to any point before you did all of this, everything will be reverted and you will have to do it again.
My advice is to click through a few lines of dialogue and save your game.
After you have done the changes and saved your game, you can uninstall the mod if you want.
I hope my instructions are clear enough. If you need any precision, don't hesitate to ask.