Girls only is my friend curious or a sluts help me?

Hi im a 16 year old guy and i was hanging out with my female friend we were not dating she is 16 short and good looking. I was at her house watching a scary movie and she jumped on my lap and said she was scared. I didnt care so we kept watching the movie. But then there was asex scene and i felt her thighs and vagina geting really warm on my lap and i got a big ***** and she jumped of and stared at it i was wear basketball shorts and it was very notacable and then she started feeling ger breast and bitting her lip and asked if she could see it and i said nothing just do nervous abd she git on the couch next to me and puljed my shorts and boxers off and grabed my penis and asked how big it was and i said i dont so she grabed a ruler and measured it and said 19 cm and i came on her and she said dont worry about it and then her parents came home so i left is she a slut or just curious