Question about internet site?

alright...yea i was looking at and stumbled upon a site. i was looking at a senerios section like, "two girls and one guy". mom does son. then one that said grandma does granddaughter i was like what the f****?! I skimmed through it to see if this all were real. it looked like it was taped by pros. and it didnt look like the kid were being forced... that crap is gross, but it loaded a video onto my computer. does that mean that my internet service has that logged in their data computer and that there going to arrest me or something? im scared! im not into that ****!