Kate Winslet had to ignore her motherly “instinct” on set with her daughter. The Hollywood legend has been cast with her 22-year-old daughter Mia Threapleton for the first time in upcoming one off drama ‘I Am Ruth’ – which will air on Channel 4 in the UK – and she has had to adjust to performing with her girl on set. Speaking to OK! magazine, she said: “We are playing characters – these people aren’t us and this isn’t our story. “But, for sure, one can’t help but draw on personal experience here and there, whether that’s your own stuff or something you’ve gone through with a friend or a family…