Jenson Button's model girlfriend Brittny Ward shares busty Instagram shots as she soaks up the sun in Monte Carlo in a tiny print bikini

She's been inseparable from Formula 1 star Jenson Button for the past few months.

And model Brittny Ward proved why the racing driver is so smitten when she posted a sizzling shot on Instagram on Tuesday.

The 25-year-old wowed in a tiny print bikini as she enjoyed the sun in Monte Carlo.