Am I being overly concerned - a single man about to marry into the family offers to go upstairs three nights running to help get three young girls (all under 9) ready for bed - their mother was present. While he was upstairs his fiancee stayed downstairs on the sofa watching TV. When their father followed him up on the third night he immediately turned round and came down. At a family dinner, the two older children described the youngest as this chap's "special friend". He and his fiancee (the family member) have babysat the children on a couple of occasions. He has no children himself. Whenever he is with the children it is the youngest - under 4 - he pays most attention to. Would welcome any feedback.