Please don't turn it sideways. It's lovely the way you have it in the first photo. I don't know how to do bargello but can you not continue with the pale pink in the center.....or use the darkest green as a kind of center?
It's really beautiful! Your MIL is going to love it!
EDITED to say I posted this before I saw your solution. It's great!
Last edited by Friday1961; 12-11-2015 at 09:54 AM.