Feelings in Conflict

My girls have mixed feelings about me spending more time with them, especially on their homework. Before I completed my PhD, I had to split my spare time between supervising them in their homework and doing my "homework" (writing my dissertation). However, now that I have obtained my PhD, I could spend all my spare time supervising them in their homework. They are sometimes glad that I am spending more time helping them in their work. But sometimes, they wished that I still had my "homework" to do. Reason? They said I would not be breathing down their necks so much... Oh dear. Am I being too much of a Tiger mom? :(