Ovulation?

My big female whose been locking up every time i paired her with my male, hasn't been locking up lately. While she was on her break period i found her doing this... Is it ovulation? Im not sure... She has never soaked in her water dish before...
http://i220.photobucket.com/albums/d...e/DSC05809.jpg

http://i220.photobucket.com/albums/d...e/DSC05810.jpg

http://i220.photobucket.com/albums/d...e/DSC05811.jpg

No, just looks like an uncomfortable ball python trying to soak.