I just want to give you a taste of having a dildo in your ass, so we'll leave the lesson there.
Again, as a reward for finishing another part, you can stroke for a few minutes without anything in your ass, but once again don't cum. Have your dildo at hand, and if you think you can't hold back, try to put the dildo in before you cum.
If you wish to stop now, and continue with the last part tomorrow, you may, but make sure you warm up enough to be able to fit a dildo in your ass when you return.