she knows her cycles SO well she celebrates "sushi night" but...
i don't think it's a spoiler to mention that a main device in the film is the term "sushi night" which is laboriously explained in a one of those "get to know the characters" scenes straight out of Hollywood Upstairs Film College, but...
*spoiler alert*
it's just a stupid gimme "stupid" when he explains that the first evening, as the film begins, he received an eviction notice and--ignoring that he suggests that he'll impregnate her THAT NIGHT as some bizarre happy promise even though... he JUST got an eviction notice and the audience was led to appreciate and adore(?) her with her little friend discussing her plans to procreate and it just feels disturbing sadly irresponsible--he didn't tell her because it was "sushi night"; i mostly focus on this because the solarmovie page had a comment making fun of a further line about "sushi night".
it's just... she seems responsible when discussing planned procreation with her friend, she steps in and answers FOR franco when the cop asks him what he does like she's the boss and knows it all, but... even though she's all that, AND knows her cycles, she DIDN'T know that they were about to be evicted or that they even needed to worry about it at that "time of the month" when it's been established that he's unemployed and they probably share their wealth openly.