Is it weird that a 15 year old still takes naps with her father?

I find it completely normal, coming from my family's background and such, but I feel that some people might find it disturbing for a pubescent child to still sleep with her parents. My sister is 14, almost 15 and she still sleeps and takes naps with our dad on his bed. She used to sleep beside our mom and held her hand while falling asleep, until she passed away from cancer, and sometimes would crawl in bed between our parents. Now that she's at a delicate age, it may be odd for people outside our family to hear that she sleeps with our dad. Obviously, nothing indecent happens. She's a very smart kid and knows society will find that wrong. I feel that taking naps and cuddling with him is just a way to make him feel less lonely and feel loved because our mom is gone. He is never the type of man to even think of such things either, he works many hours by himself to earn money for us and is one of the heads at our church. Do you still find it odd even under certain circumstances?