It would be good to arch the tail up higher [ like a dog when it's happy + tail up in the air] but even from this pic I believe 99.9 % that you're right and Lily is a she.
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!