Honestly Was Not Thinking This When I Put Security Cams Up

My wife knew about them, she helped with some of the installs but not all of them. I had a few that were fairly well hidden but honestly never was thinking about seeing sexual activity on them. The one in the garage was not exactly hidden but also blended well with some other things on the shelf, with the lights out there turned on the cam light was hardly noticeable.
I was reviewing videos one evening because there was quite a bit saved online so wanted to clear some out and saw quite a few garage ones in the middle of the day, imagine my surprise when I watched my teenage daughter sucking off her boyfriend right by the stairs, she was sitting on the steps and he was in front of her. It was like watching a train wreck and i just could not stop, watched him pull off her shirt and bra, strip off her bottoms and she turned around for it. He pushed into her and my eyes went wide watching her head going up and down as he gripped her hair pulling on it pretty hard. Sound and all, God this feels amazing, your cock is so big Br***** Yes! Yes! then he knelt down behind her and licked her ass and pussy from the angle I could see she was really enjoying that a lot.
So I deleted them all after watching a few times then casually asked my wife one evening a few days later if she thought our daughter and her boyfriend were, you know, active. Oh, not entirely sure but I do not think so she went on saying they were pretty close and she would have probably talked to her about it. I did not say anything because I knew it would just send my daughter in the other direction of no open communication and hoped for the best on not becoming a grandfather soon. I was also wondering why not up in her bedroom for this, why the garage? During the time of the video they were the only ones home, daughter knew the outside cams would record the two of them so not like she was sneaking him into the house or anything. So I kept checking up on the recordings, nothing new for several weeks then again they did it in the garage in the middle of the day. Mystery for sure.