Cheers chaps, Letting her do what she felt like for a little before turning on the romance certainly worked. She moved into his bungalow and instead of moving in to a big house with basic things I did up his bungalow completely, adding a few rooms, expanding others and replacing most things. I built a kids' room and will add an upstairs soon just because a large, one storey house doesn't look right, probably just have a play room up stairs. Built a kids room with bed, computer, all that and bought a love bed so they had a baby of their very own (awwww). I also found out the best way to keep the sims happy is actually play in bed, social and fun are two of the biggest impacting things on their mood and 'play in bed' pretty much gets them to full although I must admit it isn't exactly enjoyable telling them to do it all the time.
Great house, great family, not having another kid yet but they might in time. Now to get him off nights as a vice cop... just need 4 family friends but he never finds the time, I'll have to work on it.
Thanks again!