What do you think some of the effects would be for a boy to discover his mom having sex online?

With the proliferation of porn and stealthy ways to view it, Web ability cell phones; tablet PCs, Kindles, netbooks, laptops, etc. Kids have access to all sorts of porn and there is no way to deter them. About as far as many sites go is to post a disclaimer stating that if you are not 18 to close the page and click off, yeah right.What if a kid is sneaking a look at porn and sees his mother on an adult Website having ferocious sex with some guy not his father (even if it was very old footage because nothing on the Net ever dies)? What if she was in a threesome, foursome, or had a train on her? How would it be different if he discovered it while alone or had it revealed to him by his peers who found it first? In what way would it change how he views her, even if she did it while she was supposedly young and dumb?