My daughter and her friend_(0)

My name is David and I am a 33 year old guy. I was married for a few years but those ended and haven’t seen my ex for years. Ever since she left I have taken to raising my daughter on my own. My daughter’s name is Erin and she is now 14 years old. It’s been kind of hard with her now a freshman in high school. She has all new friends that come over and they all have sleep over’s at each other’s houses.
Tonight was Friday night and my house was the selected house for this weekend’s sleepover. I didn’t mind. I never want to be one of those dads that are controlling and can’t let their daughter have a good time. Tonight was different though. Erin didn’t have a lot of friends come over tonight. She only had her best friend Katelyn come over. This was perfectly fine by me. It wouldn’t be as loud and she would still have fun. Katelyn was a very nice girl. She was 14 and was very pretty for her age.
It was 5 pm when the doorbell rang. Erin went to go answer because she knew it was Katelyn. I could hear them talking form the kitchen where I was making a pizza for them. They said hello and laughed about stuff that happened at school and made their way to the kitchen. They came in and Katelyn caught my eye. She had just gotten back form volleyball practice and was in a tight Wight shirt and black skin tight spandex. I couldn’t help but stare a little bit. As my daughters friends got older they got hotter too. Katelyn had nice smooth tanned legs. I could see the perfect shape of her ass and the lips of her pussy when I looked at just the right time.
“Hey there Mr. Adams” she said to me with a cute smile “thanks for letting me stay the night again”
“Oh it’s no problem” I replied as I tried not to stare at her pussy through that spandex.
: is it ok if I go take a shower? I’m all sweaty form volleyball”
“Yeah” I said “you know where it is”
She walked out to the shower and I stared at that perfect round tight ass as long as I could. Somehow thank god my daughter didn’t see me. I told Erin she better go get the basement ready for their sleepover and I would finish dinner. As I finished making dinner for the girls I couldn’t help but think of that hot teen in my shower naked with water all over her body. These thoughts continued on as I finished up dinner. I went to go get the girls to let them know. I yelled down to the basement to Erin and next I went up stairs. The bathroom door was open so I went to Erin’s room to let Katelyn know. I lightly knocked on the door but it was still enough to force the door open. My eyes almost fell out when I saw it open. Katelyn was bending over pulling up her pink thong and was still topless. She had her back to me so I couldn’t see her cute boobs but I got a great look at her amazing ass. I tried to force out words but was speechless
“Oh sorry” I finally got out hoping I could shut the door like it was an accident. She turned around wearing only her thong.
“Oh hey Mr.