Only one interaction is available and it's "Argue"

[Socially awkward brachiosaurus]

Hi! When my characters meet they have only one option in "interactions" (blue button) and it's only one interaction which is "argue" (even tho they are "Lovers" in relationship card)

How can I unlock more different interactions?
Also what does trigger character mini theater? (i opened their whole "Basic info" cards and configured their personalitis)