Are Tiger Woods and Lindsey Vonn Getting Serious?

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It looks as though Tiger Woods and Lindsey Vonn are getting closer! The two have even spent time with each other's families.

As Us Weekly reports:

Vonn's brother recently gave ski lessons to Woods' daughter Sam, 5, and son Charlie, 4.

Another sign of the hush-hush pair's devotion? After Vonn injured her knee in an accident during the super-G at the Alpine Ski World Championships on Feb. 5, Woods sent his private jet to Austria to fly the gold medal-winning skier home.

The couple were first spotted together skiing in Austria in November.

Oh yeah they're sooo together!!