To the OP.... I do understand that you are venting!!!
But, a bit of 'attitude' may be showing as well.... You do sound like you care about your family, grandchildren, etc. And you really seem to have made a huge effort. I just want to point out one little tiny thing here. You mention that "I never expected my mother to ask if these things were ok with me" There is a HUGE difference here between 'you and your own mother' (who were probably pretty 'close' and had the same outlook) and your son's wife and her MIL (mother-in-LAW) This is KEY....
To you these little things you have mentioned may seem insignificant and harmless... But, as a DIL, I can tell you that sometimes there are indeed HUGE issues involved. WHENEVER your DIL is present, then SHE is the acting mother/caregiver. PERIOD. What you are doing is taking these little insignificant issues and putting them into a huge power-play.
Uhhhh-Ohhhhh!!!!
This is probably about unrealistic 'expectations' and hurt feelings on both sides. Remember, you are dealing with raw feelings here. And, you cannot simply 'expect' your DIL to interact with you the way you did with your own mother. (or even your own MIL......)
It sounds like there has been some considerable hard feelings and friction built up between you. My advice would be to NOT quote "Have a 'talk' with her".
What you want to do is to prevent these little molehills from turning into mountains!
I think maybe you could take a bit of a Cooling Off period, then mention it to your DS.... I am NOT saying discuss the whole situation behind your DIL's back!! Do NOT say, "DIL has treated me with disrespect...." Simply say something to the affect that you love your grandchildren dearly. And, you respect your son and your DIL as parents... And, you feel really badly that there seems to be a little friction there between you. Then maybe let him talk to his wife and see if would be a good idea for you all to talk and to make amends and come to some good common ground.
You may find out that this will put you and DIL back on some common and equal footing... and this will greatly reduce the perceived 'disrepect'.
Hugs and best wishes for you all!