Things between Tiger Woods and Olympian skier Lindsey Vonn are getting more committed each day.

The 37-year-old superstar golfer and Vonn, who met last April and began dating in November, have introduced family members to one another, showing the relationship is seemingly getting more serious. Vonn's brother Reed, US Weekly reported, recently gave skiing lessons to Tiger's kids with ex-wife Elin Nordegren, 5-year-old daughter Sam and 4-year-old son Charlie.