"On the next episode of Deep Space Nine! Tensions rise when Miles O'Brien's wife is possessed by a sadistic, emasculating space demon, and he can't tell the difference."
In all fairness, she also had infant Molly with her. The instinct to protect her child kinda overrides. She was still written rather coldly overall and there is no apparent chemistry when things are going relatively well. As a couple, they are great at arguing and proper credit to that aspect of both actors.
Essentially, their tiny bug brains think the light is the sunset, so they keep turning to keep the "sun" at the same angle so they can go "straight." No matter how far they fly, they don't make any progress. They are trapped in this little hell we made just for them, not understanding why they can't get to where they are going.