The kiss could actually make their relationship more complex. They might both try to deny their feelings at first, especially if they think it goes against the norms of their ninja world or their team dynamics. However, as they keep thinking about the kiss, they can't help but be drawn to each other. There could be a lot of internal conflict within them, with Sakura torn between her loyalty to Sasuke and her new - found feelings for Kakashi, and Kakashi having to deal with his own insecurities about getting involved with someone so much younger and his own past traumas.
Their relationship could become more awkward at first. Sakura might be shy around Kakashi, and Kakashi, who is usually so composed, could also be a bit flustered. But as time goes on, they might start to open up more to each other about their feelings.