I looked at your album...very sweet cats. It certainly does look like that they had an excellent relationship before Ollie. I would be hopeful their friendship can be restored after she's been spayed and it might take a few weeks later to settle her homones. I would keep Charlie away from her as she will feel sore after her spay and you don't want her to think he had anything to do with that!
Did Ollie spray anywhere? His scent could also still be upsetting to her. If you haven't done so, thoroughly wash out the litter pan he used with dish detergent, and wipe down or spray anywhere he laid on the furniture with rubbing alcohol to remove his scent. It might help.