Just forget about the message she sent and go on about your life like you did over the weekend. You don't need to contact her because you are busy living your life. I wouldn't expect that her response was some sort of turn around; I think it probably is a move to put you in the friend zone. WAS have this delusion that they will be pals with LBS once the dust settles, and I think this may be her 1st step towards that end.
This and the fact that she is in contact with your family is called normalizing. She would like to think that after the D everything will be exactly the same except she won't be married to you anymore. She will still be able to spend time with the family members she like and there will be no fallout from her sh!tty behavior.
I clearly remember my exw wanting to come to my parents to see my niece. The look of shock on her face when I told her she wasn't a member of the family anymore and wasn't welcome to my families functions said it all. It never occurred to her that things like this would be the result from being D.