4 to 5 Times! .... If Steven Moffat didn't intend this in the series ...
 (damn 5 to 6 now) I'm still in the first episodes and the mention of them being a couple in the whole 51 minutes that I watched ...

Mrs. Hudson ... Mycroft ... a restaurant owner (twice) and twice by Sherlock and/or John after the restaurant owner .... thennnnn