Ben,
when i had her i noticed she is rough with the anemones.. however, i believe maroons in general are rough with them..they really like to wiggle around in there... and they will bite them at times too.
no matter how small the anemone will get she will keep her chin right there.
i would estimate the age of this fish at around 10yrs, i had her for 6 and she was large when i got her.
good to see it is getting along with the smaller one.. there should be some info out there regarding hosting, no idea why they would want to eat the darn thing though...