Family situation

I have a great aunt who came into quite a bit of money years ago and she shared lots with her granddaughter.  Her granddaughter has not been one to make much of herself, partied alot in college, didn't finish and was given a job as a secretary at her mother's place of employment.  She bought her granddaughter a couple of cars and eventually had a house built for her, which her granddaughter got absolutely free. After grandmother bought her the house, she and her boyfriend got married and had a baby.

So, my daughter, went to college as well, got a job on her own after leaving college.  She met a guy and they married and had a child.  My daughter has not felt that they are financially sound enough at this time to purchase a house, so they rent.  I don't know if they are saving for a house or what they are doing, but regardless, they choose to rent.

So, at Christmas dinner, my great aunt made the comment that her granddaughter did things the "right way" by buying a house FIRST and then having children.  She went on to say she couldn't imagine anyone being stupid enough to throw away money renting a house when they should be investing in their children's future with a house.  She looked over at my daughter and husband when she said this.

I didn't say anything and neither did my daughter.  Well, after Christmas, my daughter told me it really bothered her what she said, especially in light of the fact that her granddaughter hadn't worked for one single thing she has adn my daughter and her husband have worked for everything that they have.  I agreed and told her I was sorry I didn't speak up and my daughter agreed that would have been inappropriate to do at a family Christmas gathering.

So, now holidays are over and I really feel I should call up the great aunt or go visit her and let her know that I think what she said was of very poor taste, to glorify her granddaughter who was given everything and never worked for anything and put my daughter down.  The tricky part, is this is a dramatic aunt and she is the type that I could say it as nice as could be to her and she could possibly call everyone in the family and say I cussed her out or something, just to get the attention.  If it were me she was talking about, I probably wouldn't care, but I almost feel like I am letting my daughter down if I don't say anything and on top of that, I don't want her to feel free to put my daughter down at future gatherings.

So, am I kinda on the right track here, would you say anything or would you let it go and wait until the next family event and see what happens?