<human>: Condense the text into a few key points

Hi, Reddit, i need some help. I was at my girlfriends house last night and was hanging out with her and her little brother [13]. At about 2'o clock her little brother went to bed, me and my gf stayed up playing video games. After about 30 minutes she fell asleep on her couch. I got bored and found her little brothers phone and started going through his gallery. i found a folder labeled facebook and noticed all the pictures in it were of his 26 year old cousin who had gotten her boobs done. In all of the pictures his cousin was showing a lot cleavage and sticking her butt out in a lot of them all the pictures were taken from her facebook page. i then found another where her face was photoshopped onto a naked woman's body. Feeling weirded out i decided to keep looking and then stumbled upon pictures of a girl whose body looked very familiar to me. It was my GF of 6 years. they were all pictures taken on her phone, for me. they were taken about a month back. Her little brother took his camera phone and took pictures of my girlfriends phone with the pictures on it. he did this on the 21st of May. I told my GF and now were both shocked and confused and upset and dont know what to do. we don't know if he was 'using' them or showing them to his friends. please help.
<bot>: Found my Gf's naked pictures on her brothers phone. we're Unsure of what to do and how to handle this.