I the US they are supposed to be washed with water that is at least 20 degrees hotter than the temp of the egg. I think it has to do with physics. If the water was colder, (egg warmer), it would chill the egg as being washed, egg would contract (contents inside the shell) and potentially draw bacteria in. whereas if the egg is cold and washed with hotter (relatively speaking) water, as you wash it, it slightly warms egg contents, they expand, and are less likely to draw stuff in through the shell, but rather 'push' outward to help prevent anything from going through the shell.
My one caveat with this is that if the water is too hot, it can actually open the pores of the shell - but how much, and at what point it would become an issue, I don't know. I don't have data on shell porosity.....I just know that air can move through the shell, and to some degree moisture (remember, older eggs can have a larger air sack/bubble because the egg loses moisture, shrinking the white volume, and enlarging the air sac.)
I do not know all of the specific testing/research on this - I just understand the above based on my VERY long ago Physics & Chem courses in college/ basics physics/chemistry of temp and of fluid mechanics.
@BY Bob and
@RoyalChick might be able to add/expand/correct on this concept/topic.
It could be that she wants attention/recognition - but on her terms (i.e.so isn't sure she wants to be held - but wants to be the center of attention./focus of 'momma'). It does sound like a bit of improvement - i know it is slow going - but bless you for your patience - keep working on her...hopefully by the time she is an old lady she will be more loving/accepting and less demanding of your attention in a harsh way.