Sort of hot towards the end of the Twilight movies
I would say in the "breaking dawn" movies she was quite sexy. At the start of twilight series she was semi unattractive or plain - you get the picture. But around 2011-2012 it was like she had a glow up. Her body also became more "feminine" with slight curves. Where as before she was totally boyish.
The breaking dawn sex scenes she looked GOOD. I did not think she could pull it off but she did.