Does my mom trust me?

i transferred schools a year ago and i had to leave some really good friends behind. my BEST friend was a guy, so we hang together A LOT. i'm at an age where i have really close friends of both genders. whenever i hang with him, my mom ALWAYS asks what we were doing! we're usually at his house alone in his room while his mom is out. we DO NOT do any of "that stuff" but i'm afraid my mom always thinks we do. like today, the town had a block party and my friend and 2 friends walked around town, went to the park, got a snacks and drinks(not alcohol lol) from turkey hill, went to his house, and went to the block party for a little while. when she picked me up after,i met up with her 10 minutes late. she looked mad like she suspected i was doing something bad. then she asked:"was ryan's mom home?" his mom smokes so my mom asks: "does she smoke IN their house?" his house is smoky and smells like it, so i smell like it when i get home. my mom asks me questions like if she wants to know if i had sex with him or smoked his mom's cigarettes!! but ryan and i are like BROTHER and SISTER!!! NOTHING more. we don't smoke, we don't drink alcohol, we don't do any drugs, we don't have sex, we don't do anything like that, we are best friends who are simply retarted together and we don't get into any trouble