'Having Sex Outside My Marriage Makes Me A�Fabulous Mother'...

A Pilates teacher who has an open marriage claims having sex with strangers makes her a better mother - and that she wouldn't give it up even if her children asked. 

Gracie and her husband Oz are part of an 'ethical non-monogamy' community where members openly have extramarital sex with their partner's knowledge. 

The 48-year-old, who has two children, insists the arrangement not only improves her own relationship but also makes her a better parent because it gives her more 'energy'.