Jools Oliver has shared a candid message with her fans on Thursday evening, alongside a sweet black-and-white photo of her two sons, Buddy and River.Keeping the message cryptic, the children's designer - who is married to Jamie Oliver - touched upon the period being "emotional" and "exhausting".MORE: Jamie Oliver creates 5 quick and easy Back to School lunch IdeasWATCH: Jools Oliver and daughter Petal in fits of laughterShe wrote: "A week so far of many emotional and exhausting 'firsts' all