Have started to use a nanny one day a week. My son has a childminder who he has had since he was five months old who I adore and is like a friend. Thing is the nanny wants her days. Even though I am happy with the childminder I would prefer to use the nanny four days a week. The childminder needs the money and cannot fill another space that she has, I feel so guilty how can I let her down gently.