Actress Reese Witherspoon is finding life as a single mum difficult - and is struggling to balance her work and family life. The Legally Blonde star is preparing to return to the big screen after a break of over following the collapse of her marriage to actor Ryan Phillippe last year (06). But Witherspoon admits life as a working single mother is "agonising". She says, "The next film I'm about to do is the first full movie I've done in two-and-a-half years because it's hard with small children. "I do feel torn, it's agony. Any mother or father will know it's so hard to deal with just the guilt of leaving your kids. "I'm trying to work close to my house and my home so my kids can stay in school and we can have a nice, stable life."