Not expected from a professional like u Serena.The best way to overcome this is to apolagise with the lineswoman.Also try to cool down and forget all this so as to be fresh for ur further games.TAKE IT AS A LESSON.
This Serena williams is too pampered by her elder sister, Venus. We all saw when she lost in Wimbledon finals last year, the way she reacted while playing doubles with her sister.
It was clear that Venus, who was in a better form in Wimbledon this year, gifted her little sister the Wimbledon title so that she won't throw any tantrums again.
Too bad for Serena that Kim Clisjters isnt her elder sister and doesnt beleive in gifting matches like Venus.
Totally unprofessional by a person of that stature. One should accept defeat with dignity and grace. She reminds me of the Australians on 6th Jan '08 in Sydney. To make up, Serena, I believe, should publicly apologize to the lines person over the incident.