Tessy insulted the whole grand ducal family several times on her instagram, so no wonder they did not include her. Her boys are old enough to live at a boarding school, so she clearly isn't their main care giver and was not needed at the funeral. The boys had their father and their uncles/aunts, so no need for Tessy. I guess they would have invited her to go with the family if she had treated the family better. She even made the funeral about herself on her instagram, there was no need to post what she posted. There was also no need for her posting pictures of herself dancing happily when everybody knew that GD Jean was dying. So in my opinion, Tessy is the bad one here, not the grand ducal family. They are not arrogant, they just didn't want Tessy to pose during the funeral or during the funeral procession. They didn't deny her access to the funeral, she just had to sit with the public because she isn't a family member any longer.
I am not sure how many times over the past few years I said that she reached a new low and there's no lower low, but here we are - posting this funeral on her insta. unbelievable.
That was a sad but very dignified service. I was really heartbroken to see the beautiful kids of Princess Margaretha of Liechtenstein. They really looked devastated to lose their grandfather.