What details from Mayella's testimony would leave one to believe she is lying? Find the details and interpret what we learn about them.

Atticus asks Mayella if Mr. Ewell is a loving father. With hesitation, Mayella says that he is "tolerable" except when he has been drinking. However, she insists that he never lays a hand on her or beats her. Atticus then asks if this was the first time Tom Robinson has been invited into her house, and Mayella jumps a little before saying that it was the first time. Finally, Atticus asks Mayella if she remembers being beaten in the face..... at first, she says no, but then yes.