The song is about a new marriage/starting out together and apart from 'white lace' the words fit the Dora/Steve relationship beautifully I think. And it is nice to see them smiling and happy together.
Their relationship was similar to a marriage really (apart of course from the physical side). They lived together, worked together and (I was gonna say played together but perhaps not )
it would have been almost impossible not to get involved with each other in some way - whether love, hate or indifference.