Originally Posted By: SmileysPerson
So being upset at a wrong done to a child

No one is saying that shouldn't upset you. You have a right to be upset about it.

But...

Look at what YOU did about it...

You jumped onto her FB page to see what she was doing, saw an update, then took the effort to search for a time-stamp, did a time difference calculation, deduced a value for the time-stamp... then became angry.

So, with your aforementioned knowledge about her indifference to her children and only caring about "being free" while traveling (aside from sending you nasty-grams to push your buttons) the following remains:

You actively sought reason to be angry with her.

That does not sound like detachment to me.