The Two and a Half Men star is said to have slept with Leal on the day of his sixth wedding anniversary to Demi Moore in September.
The couple divorced two months later, with Moore stating that Kutcher had violated "sacred values".
Recalling the "insane" aftermath of their fling, Leal told Fox News: "I got fired from my job. I am no longer friends with my best friend who was my roommate because it caused so many problems and I had to move out... My dad wouldn't even talk to me and I got a lot of disturbing phone calls, even from my friends' parents.
"It was insane. I had no idea what I was getting myself into. It might have seemed like I was asking for it, but I wasn't."
She added: "He was a good-looking guy and it was stupid. When people say to me, 'I can't believe you did that', I want to say back that most girls in my position would have done the same thing."
Leal insisted in the interview that she did not know that Kutcher was married when they slept together.
The 22-year-old previously argued that she is not to blame for the failure of Kutcher's marriage to Moore, saying that she was merely a "bump in the road".