Kate Middleton’s sister Pippa is always so stylish and in 2019 the wife of James Middleton wore a yellow polka dot wrap dress to Wimbledon which is ideal for hot, heatwave weather. Kate Middleton’s sister Pippa is always so stylish and in 2019 the wife of James Middleton wore a yellow polka dot wrap dress to Wimbledon which is ideal for hot, heatwave weather.