Glen is not a grandpa

Does anyone else think it's so incredibly disrespectful that Whitney keeps referencing Glenn as a great grandad? Biologically, yes he is. But he has never even met this 50 something year old daughter before. He's not a dad to her or a granddad to her children. Her adopted parents are!! You know the ones who took care of her her entire life?? Oh my God it's making me so mad to rewatch these episodes. It's so disrespectful to the adopted parents and to the whole family. But that family seems kind of fucked anyways… They see money in this and I assume that's the only reason why they want a relationship with the Thores.