Is it normal that i think my female cousin is hot?

ok, this may sound wrong but i have this older cousin 2-3 yrs older than me. she is very hot and over the years ive notice it more and more as i got older. i visit her maybe once a year in mexico and have to stay in her room with her almost like a sleep over!! i know ill never do anything with her but is it right for me to get a boner when we have to bunk in the same room? she has colored eyes dark blond hair THE WORKS! PEOPLE!!