Yeah, my take was that the romance didn't start til way later. However, earlier on (once the hatred cooled and things were semi-friendly) LBS2 used his renewed confidence to act playful/flirtateous in a semi-casual way. You know, just strutting his masculinity comfortably in her presence - not in a conceited way, just a comfortable way. As Deida notes, it sends the message: "This is MY polarity, Hon. And I see you and celebrate you as a feminine woman, at a complementary polarity." The rest of the questions of hers - male goal-directed behavior, financial stability, honesty, happiness, etc... - are answered over time by the LBS' actions and consistency.
The small acts of kindness were immediate once the friendliness stage hit. Offer, holding low expectations. He gave one example- he brought a pint of his child's favorite ice cream, and a specific pint of WAW's favorite kind. When she declined, he gave a spoon to the child, took one out for himself, and they proceeded to chow down in front of W. He kept it light and funny (making "Uhmmm!" sounds to taunt her lightly ), and did it again later, with her accepting.
Sounded like just small acts of kindness that we all probably did in the early R stages, then much less frequently. IMHO, I think things that convey an intimate knowledge of the WAS would be especially good (like he knew her favorite ice cream).