Every parent knows it: managing work, children, friends and family life, all in 24 hours of sleep, is a daily challenge. So when you are alone, it often becomes mission impossible. "The hardest thing is the feeling of not having the right to make mistakes and never having time to breathe," explains Caroline, mother of a little girl who is almost 5 years old. "When one is sick, tired or migraine like me, there is no one to take over. The father of her daughter left her, a few months after birth. He stayed in the country where they met.