I've been with my partner for 18 months I have a 6 year old and he has a 6 and 8 year old. We have always been together since day one as the kids had already met on occasions through gatherings with mutual friends. We all hit it off with each other straight away. We decided to move in together rather then have two separate homes when moat of the time they were here anyway.  We have had family days out, family holidays.  We have done everything as a family. Then all of a sudden three months a girl his 8 year old daughter changed.