sentences:  In 2007, Jack Branning moved to Albert Square and began a relationship with Ronnie Mitchell.In 2008, he had a fling with his girlfriend Ronnie Mitchell's sister Roxy she became pregnant and later gave birth to a premature baby girl telling everybody that the father was her husband Sean Slater.But on Christmas Day 2008 it was all revealed as Jack's sister Suzy Branning put the DNA results into Sean's Christmas cracker after being paid by Ronnie and Roxy's father Archie, revealing to the Mitchell family that Sean wasn't the dad.