Mummy you forgot "five!!"

*Me and my little three year old at bedtime:
Me: I love youuuuu
Yusuf: I love you too too tooooo Mummyyyy!!
Me:  I love you three three threeee...
Yusuf: I love you four four fourrrrr...
Me: I love you six, six, sixxxxxx
Yusuf: Mummy you forgot five five fiveee!!!