Fantastic game! keep adding more to it. The pictures are really nice and i love how each one gets a little better as you progress. It makes you want to keep going to see how far you can get the girls to go. Just a few things you need to make the game even better:
1) Some music in the background would be nice. If you can find some relaxing non-copyrighted music, it would really keep if from getting stale about half way through. But give the option to turn it off if the player feels inclined to do so.
2) Some events would break it up a bit. You could have them happen at some milestone days like 10 25 and 50. Something that made the teachers interact with each other and if you had a certain level of lust or obedience on both teachers, something cool like a lesbian scene would happen. Also, i like that there is no time limit like "finish in 30 days". If you do decide to add a time limit to encourage people to play through all the events, then allow them to continue after the time so that they don't have to play the whole game with a strict schedule to see all the pictures.
3) Instead of the game just auto taking you to the end screen with no way back, give the player a way to choose when they are ready to end the game instead. Because some people may have missed a choice or wanted to see a picture again.
4) Some hidden easter eggs always add a little challenge to a game, especially if you have already beaten it before. Hide something in the rooms the teachers are in that is click-able and unlocks a secret picture or action.
5) Some new teachers would always be welcomed (but i know that is a lot of work, so its just a hope instead of a request). You could even unlock like a head mistress sort of boss level after you have maxed out all the teachers.
6) The times fucked is nice, but it doesn't really do anything except keep score. It would be cool if it worked like the other two meters and unlocked something the higher it goes.
7) If you finish the game, you should be able to unlock a gallery so that you can bask in the glow of your accomplishments when you are done.
I hope that you consider some of my ideas and incorporate them into the game. But as it stands now, the game is very good and you should be proud of making something this fun and interesting. If you just stick with it and keep improving it, you can make this a game that everyone on the site loves.