What's the Name of That Book??? discussion

This is a story about an eccentric woman who lives alone and collects butterflies. She is also obsessed with time and has to know exactly what time it is at all times. She is okay until her sister comes to live with her. I can't say anymore without giving away spoilers.

Is it Behaviour of Moths by Poppy Adams?

Yes, that is IT! Thank You!

Yey! You're welcome :-)
I really enjoyed it, good twist at the end.