ONTD

"Teen Mom" star Farrah Abraham's recent DUI arrest was totally not her fault, you guys.

In a new In Touch interview, the best-selling author (what, you haven't bought "Passy Perfume" yet?) blames her St. Patrick's Day bust on 1) her sister, 2) boredom, 3) being sick and 4) super irritating cops.

"I did not plan to drink because I was sick, so I took the role of being in charge and making sure my sister and I would return home together and safely," she told the tabloid. "At 10 p.m., I tried to leave, and at that time, my sister was not ready to leave, so I had been sipping on drinks to pass the time."

That must have been quite a wait and a lot of sips, because Farrah registered a blood alcohol level of .147 -- nearly twice the legal limit.

Also, instead of nearly hitting a police cruiser as has been reported, the 21-year-old single mom insists she was merely parking her own car.

"When I was parked, a police officer asked me what I was doing, so I told him I was worried about my sister and I was trying to go home," Farrah told In Touch. "They insisted on the regular questions and asked me to get out of the car. I got out of the car, and because I was upset, I yelled."

(It should be noted that the "Teen Mom" star has a healthy disrespect for other people's eardrums even when she's sober.)

However, a source close to the situation told us that Farrah's version of the night's events is actually far from the truth. Despite Farrah's claim that it was her sister and friends who wanted to stay late and drink, the source said that Farrah's companions were actually already back home by the time Farrah was arrested!

"She can say what she wants, but the truth is that her sister Ashley and her friends were miles away by the time Farrah got arrested," said the source. "A friend of Farrah's offered to give her a ride home before they left, but Farrah didn't take it."

On top of that, the source said that several local businesses were offering free cab rides all night to ensure St. Patty's Day partiers made it home safely, something Farrah was well aware of and declined to utilize.

Farrah also disputed the accuracy of the breathalyzer results and accounts that she sabotaged the test by biting on the tube.

"Because I'm sick, I could not give an accurate breathalyzer test, due to coughing and shortage of breath," she told In Touch. "I have a lawyer and all will work out with my ticket."

Farrah's no stranger to the legal system. Both of her parents, who guested on "Teen Mom" alongside their daughter, have also been arrested in the past: her father for threatening her baby daddy with a knife, and her mom for choking Farrah during an argument over babysitting.

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