A surrogate for the Rocket Man singer and hubby David is due to give birth next year, The Sun can exclusively reveal. Last night a source close to the pair said: “Elton and David love this lady like a sister and they feel indebted to her for life. Naturally she has been well rewarded. But her identity will never be revealed.” The mum — believed to have been recruited via the Center for Surrogate Parenting in Encino, California — is said to be already “several months” pregnant. Zachary will have turned two by the time his sibling arrives.