AITAH for preferring my sons laptop screen?

Hi there Reddit! Sean here, 49. Now, I work very hard and tiring days at my law form, so in the afternoons I like to come home and watch some red tube or Porn hub on my phone. Now recently, it had been a particularly hard day of focusing, so I went up to my room for the usual routine, but I realised I had left my phone at work! But it didn't matter, because I could just watch my vids on my ipad. Couldn't find that either. And then I stumbled across my 6 year old son's school laptop. So I watched my vids on his laptop that day instead. Turns out if a laptop is given to a child from their school, the school can see everything that happens on that laptop, so when my son went to school that next day, he was taken aside by the principle, councillor and school police officer. Long story short, my son had to be picked by his mother, my wife, and taken home. As soon as they got home, she immediately confronted me asking me if I had used Sonny's laptop. I admitted I did, but said that I didn't see what was wrong with what I had done, and if anything, we should sue the school for tracking my son's laptop. She said I was fucking crazy and to get out of the house, otherwise she would call the police on my for exposing a child to porn. Anyway, I'm now at a friends house where I'm writing this post. Am I the asswhole?