How would Ukyo fall out of love with Ranma?

[Spokavriel]

You never watched the episode where Ranma agreed to marry her about that sauce did you?

[Crescent Pulsar]

Watched. Read. Are you trying to needlessly insult my intelligence? ;/

Unless you meant to say it to everyone in general, to which I'd say: you should have just offered it as an example. Although I'd point out that it didn't turn out anywhere near favorable for what's being looked for, due in part to the circumstances in that story. All in all, the experience probably did the opposite, to some degree.