Sara Leal -- the 22-year-old blonde who allegedly slept with Ashton Kutcher this summer -- insists she isn't responsible for the actor's crumbling marriage to Demi Moore ... telling TMZ, she was just a "bump in the road."
Sara tells us, Ashton and Demi were having problems long before she came along -- but was she the straw that broke the camel's back?
Ashton's Alleged Mistress
I Didn't Torpedo His Marriage!
11/24/2011 10:08 AM PST BY TMZ STAFF
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