I grew up with 4 brothers my age. It just made me good at sports and gave me nerves of steel when being bullied or teased. It was wonderful all in all.
My brothers are my best friends and No! it doesn't run the boys off. In fact, all the young men who are best friends of her brothers... (There will be at least a dozen or more). Will get a crush on her as she turns into a woman.
It will be Dad that will have to guard her at the gate. 😉🌺