Both of ours are finding it hard that we've lost Edward.
George is Edward's brother, and they were very close. Often slept together - played together - George washed Ed lots. He's still looking for him - he saw the vet wrap up Edward and take him out the front door, so he sits by the front door, as though he expects him to be coming home through the front door. He's also taken to sleeping in Ed's bed - I think because it makes him feel closer to him. We're spending more time playing with him because he no longer has his brother to run about with. George and Ed never went out (their choice), so it's lonlier for him.
Magnus wasn't as close, being the newbie (ish), but often used to curl up next to Edward to go to sleep at night. Now he looks for Edward at night before he settles and goes to sleep. And he's started sleeping in the living room in the evenings with us - as though he doesn't want to be by himself - he always used to sleep alone on the bed till hub went to bed. Mags is faring a little better than George, because he has the distraction of going outside.
Fortunately they're both still eating, and more or less behaving normally. Although George has started overeating, which we're keeping a close eye on, and doesn't want to come when called (unless it's for food).
All I can do is re-iterate the advice you've been given - they take it differently - be there as much as possible if they need you, and let them be by themselves if they need to. And keep an eye on her to make sure she's still eating and grooming etc.
But it'll take time for her, just as for you.
I know I'm still heartbroken about losing Eddy-puss - I can't imagine that the cats aren't too in their way.
