Dave finds his kiss with Sarah hard to get out of his head,even dreaming about it. However there are more pressing matters as he rows with Anna,later making up,for giving the kids mobile phones,and discusses with mother-in-law Beatty the need to track down Lucy's natural father. From Rita's old university diaries he locates him as being Stuart Pike,who,in fact,knew about Lucy as Rita kept in touch with him. But he is still occupied with Sarah and they go to bed together when all his children except little Evie are with his ex-wife Michelle. However Evie sees them together.