baby stop carrying when mil carry

Dear mummies My mil and i are taking care of baby together. I am currently on ML. It hurts me that baby stop crying when my mil carry and crylike murder when i carry. I feel jealous toward my mil and even a tinge of hate toward baby for stop crying when my mil carry. I sometime secretly hope that baby cry when my mil carry so that i knows baby cry cause of some other reason rather than just want to be attached to my mil. It doesnt feel right to me as a mum that baby seek comfort with my mil and not from his own mum How do i handle this emotion? This is so wrong and unhealthy.