My dad has this female friend at his CrossFit gym who is 30 years younger than him. This woman is also friends with my sister and even has a boyfriend. She is constantly calling my dad her best friend and posts videos on her Instagram stories of my dad working out with the song Best Friend by Saweetie playing in the background. She also takes selfies of them together with that song playing. She and my dad also have matching shirts with different pictures of them on their shirts (female friend has random pictures of my dad on his shirt and my dad has shirt with pictures of the female friend on his shirt). She also took a picture with my dad hugging him and made inflatable balloons for him on his birthday. Also for context my dad has been married to my mother for 40 years. This woman definitely is closer to my father than my mother. I don’t even know if my mother is super enthisssiatic about her. This woman has come to multiple family gatherings and has not offered to help clean up or help out on any way. I don’t know if I am being weird but I just feel like this relationship this woman has with my dad is really weird and inappropriate. Married folks what are your thoughts?
tldr: dad has friendship with woman at the gym 30 years younger, she calls him her best friend.