Not exactly. They both (Saito and Akane) strongly denied being in a real relationship and state they hate the fact they were forced on it.
Sure, there are other issues
1) It's really complicated to live a secret relationship like that
2) If they both are forcing do deal with their shit family and everything is ruined because of this kind of side relationship, them well, it would all be for nothing.
Of course, we know Saito and Akane like each other, but you can't blame the people around they just accepting that they are saying the truth when they say they don't like each other.