"Wifey" is sort of a cringe term to use outside of a pet name for your own wife, but
I kind of agree with Jak. She was never really seriously interested in Leo; it was much more about finding herself away from a husband and a marriage that was problematic from the start. She may have thought 'what if' or compared Leo to her husband, but she never reciprocated his affections. She spent the time on the farm enjoying herself because she wanted to 'be a person' even without her husband, but talking to him when he came and then going to find him showed that she thought it through properly and decided that the marriage was worth working through. The husband is also not perfect. She didn't run away for no reason; even if he earnestly went looking for her, it wouldn't have mattered if he had not changed and learned to appreciate her more on the way. I think the only one that may have crossed a line (other than that annoying blonde girl whose name I forgot) was Leo, because he got randomly attached to a married lady he met for a few days. But even then, he respected her wishes and supported the two of them when the husband arrived.
All in all, this manhwa really is like a romantic movie like Roman Holiday. Lots of improbabilities, lots of annoying cliches, lots of grand gestures, but also a romance filled with new experiences, growth and rediscovery between the couple, and a pretty satisfactory happily ever after imo.