Before that, the problem at hand are these hippos/horse plushies.

The ironic thing is how mature Usagi’s response is. Maybe in the first season or R, Usagi would go on a jealous rage if Mamoru was even seen talking to a girl. But after many trials and tribulations and how many near death experiences, she’s learned to have faith in how much she loves Mamoru and how much Mamoru loves her. She’s not completely blind to how desirable Mamoru is to other people, both male and female others, but she knows that they have a destiny together and that their love is the basis for Crystal Tokyo so, “you don’t get it, do you?” and Chibiusa really doesn’t. If their love was really that inconcrete and flimsy then Chibiusa wouldn’t exist as long as she has been in the series.