Background: My favorite aunt died about 10 years ago after a long bout with cancer. She was only 49. We have always considered her husband, Uncle J, as much part of our family if he were a blood relation. He's one of the best people I've ever known. We see him once or twice a month and he is invited to our houses regularly.
About two years ago Uncle J started da
ting L. He seems very happy and we are happy for him. Last week, Uncle J brought L to meet the family so I think things are getting quite serious. She is a lovely person and I think she is worthy of him.
My mother's SIL, Snarky Aunt, asked how old L was. Mom replied that she was 10 years younger than Uncle J, who is 59. Snarky Aunt was shocked and said "That means she's the same age as BeagleMommy and the other nieces!". Snarky Aunt has a "holier than thou" attitude but we know things about her past that she tends to forget.
To my mother's credit, she just gave Snarky Aunt this look

followed by this look

. Snarky Aunt and her family are the only ones who don't have regular contact with Uncle J. They only come to events where the rest of the family are attending so it doesn't look "inappropriate"

.
I thought my mother's response was worthy of an ehell mention.