Hilary Duff has hailed ‘working parents’ after she couldn’t be with her daughter while she suffers with hand, foot and mouth disease.The 34-year-old actress admitted the infection – which causes mouth ulcers and spots and blisters on the hands and feet – ‘looks awful’ on her 16-month-old daughter Mae, and it is the first time she has seen it after her daughter Banks, three, and son Luca, 10, managed to avoid it.She said on her Instagram Stories: ‘None of my other kids have ever had hand, foot [and] mouth, so I’ve never it seen before. That looks awful.’Hilary is currently filming new episodes of How I Met Your Father, and she feels ‘so weird’ not being able to be by her daughter’s side when she is working.She added: ‘I haven’t been able to be with her all day because I’m at work.