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?

Less than two weeks before Demi Moore announced she would divorce Ashton Kutcher, he threw a Hail Mary to save the marriage ... in the form of a lavish, eco-friendly gift. 

According to our sources, Ashton contacted a high-end car company, to buy a new set of wheels for Demi's birthday. We're told Ashton picked out a 2012 Lexus LS 600h L -- and paid North of $100,000.


Our sources say Ashton wanted a quick deal -- bagging the luxury hybrid on November 9, just two days before Demi's birthday.

If it was meant to win back Demi ... clearly it didn't work. We don't know if Demi accepted the vehicle or if Ashton was able to give it back to the car company.

On the upside -- 22 mpg!

Demi Moore will divorce Ashton Kutcher, her husband of 6 years ... and she's strongly suggesting it's because of the cheating scandal.

The 49-year-old Moore says she's ending her marriage "with great sadness and a heavy heart."

Demi says, "as a woman, a mother and a wife, there are certain values and vows that I hold sacred, and it is in this spirit that I have chosen to move forward with my life."

Ashton just tweeted, "I will forever cherish the time I spent with Demi. Marriage is one of the most difficult things in the world and unfortunately sometimes they fail" -- though it's unclear if this message was approved by his Twitter team.

Demi and Ashton made headlines in September after a 22-year-old woman named Sara Leal claimed she had unprotected sex with him in San Diego.

Leal claimed Ashton told her he was "separated" from Demi at the time of the alleged affair.

With no Ashton in sight, Demi Moore hit up Sarah Silverman's comedy show in L.A. Thursday night with some friends -- and she even brought her wedding ring along for the ride.

One source at the show tells us Demi appeared to be having a good time -- laughing and hanging out ... "like a regular person."

Demi Moore looked to be in desperate need of a good meal when she hit the N.Y. premiere of her new movie last night ... and according to Joan Rivers, it's because Demi BARELY ate anything on her flight in from L.A.

Joan was on the same flight as Demi ... and after she got off the plane, Rivers sold out her co-passenger to the paparazzi ... telling them that all Demi ate on the 6-hour flight was an apple ... and some water.



By the time Demi hit the red carpet ... it was Moore who was feeding the media, by sporting her wedding ring ... despite rumors that her marriage to Ashton Kutcher is on the rocks.

The moving truck that supposedly took stuff from Ashton Kutcher's house yesterday didn't go there at all -- TMZ has confirmed.

The photo agency that distributed the picture claimed the van went to Ashton and Demi's place, but the couple's rep tells TMZ, the van wasn't at their house ... in fact, it wasn't even on their street.

The agency who distributed the picture suggested it was further evidence there's trouble in the couple's marriage.

A moving truck went to Ashton Kutcher and Demi Moore's house in L.A. yesterday ... according to the photo agency that shot this pic.

It's adding fuel to the firestorm of speculation that the marriage is on the rocks. But then again, a moving truck doesn't necessarily mean divorce.

We contacted the moving company, but they clearly wanted to stay a mile away from the story.

Ashton Kutcher and Demi Moore spent some quality time TOGETHER in Santa Barbara this weekend ... during a quick camping trip in Santa Barbara with a few of their close friends.

Amidst a tornado of divorce rumors, the couple tried to escape to Cachuma Lake on Sunday ... joined by their Kabbalah instructor Yehuda Berg and Ashton's friend Eric Buterbaugh.

During the trip the gang was seen chatting beside the campfire. The very next day, the all got in their cars and went their separate ways.

Monday, Ashton fired off a few tweets about his wife, saying, "Big night for TV #twoandahalfmen Bears vs Lions and @mrskutcher's 5. My tivo might explode."

He later congratulated Demi on her TV movie, writing, "@mrskutcher good luck tonight! you should be proud."

Just two days before the camping trip, the couple was reportedly spotted together at Kabalah center in L.A. to celebrate Yom Kippur -- the Jewish day of atonement.