Yeah,but this isn't a movie just for little kids.look at us.

If Mufasa was her dad it would be very obvious,too obvious to even think of it as a realistic possibility.even for kids.And why would Disney plan for Mufasa to be her father? First of all,they would lose money,considering how people would be grossed out to even see the movie.Second of all,they might get in confllict with the church,for putting incest in an animated movie that would be clearly watched by many children.

There's one more argument for Scar not to be the father,hehe..