7 quotes that shed light on Mark and Tiffany Cuban's incredibly down-to-earth marriage

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Tiffany Cuban said she avoids sitting with her husband, Mark Cuban, during Mavs games.

• Mark and Tiffany Cuban may be worth billions, but their relationship is low-key and, for the most part, out of the spotlight.

• The "Shark Tank" star and the former advertising executive first met at the gym in 1997.

• Their own words help to paint a picture of their marriage, from their philosophy on parenthood to Tiffany's lack of enthusiasm over her husband's political ambitions.

"Shark Tank" star and Dallas Mavericks owner Mark Cuban and his wife Tiffany are worth billions, but their meet-cute story is refreshingly relatable.

The entrepreneur and the former advertising executive met at the gym in 1997. They dated for years, and ultimately wed in 2002 in an intimate ceremony in Barbados.

The Cubans are currently worth $3.3 billion, according to Forbes, and have three children.

Here are a few quotes that succinctly illustrate their down-to-earth marriage of 15 years: