Christina – who is set to make her movie debut opposite Cher in Burlesque’ - has previously admitted she and her music executive spouse enjoy naked Sundays at home, but now says motherhood leaves her too busy for the tradition, though the couple still make time for racy fun.She added in an interview on UK TV show GMTV’ We have naked moments – I wouldn’t call them Sundays as I’ve been working so much on my movie, but yeah there’s definitely time for fun and play in my day.The 29-year-old beauty also admitted she feels sexier than ever since becoming a mother.