Fitness Model Sexy Suicide

How did the fitness model with the perfect body commit suicide? First, she stabbed herself in the navel with a knife and then flexed her six-pack abs while the knife is stuck halfway in her navel. She then put herself in a push-up position and did some push-ups, making the knife go in and out of her navel, ripping her guts with every push-up. After the push-ups, she then put herself in a sit-up position.

How many sit-ups could she do with a knife stuck deeply in her navel before she died a very painful death with blood coming out of her mouth?