aunt is getting married at 60

I'm happy for her...I truly am. She is widowed and my uncle died when I was like 7 years old and I'm now over 20. She's been dating this guy long distance for years (she has known him since they were little) but he just asked her to marry him... her daughter is kind of upset about it..probably because of her dad and everything. Like I said personally I'm happy for her however...I can't help but feel like it's kind of weird to get married at 60 some years old. Idk! What's everyone else think?