the dynamics of their dialogue seems quite evident to me.
MC, who is a suicidal aspirant, is ready to end his other relationships / dating, Maya tells him to continue as well.
Maya replies to MC, MC promises loyalty, Maya refuses
the relationship between Maya and Josy is never questioned, it is not open, it is not casual, even when MC ran away after Josy's surprise the relationship was already official.
then MC blessed it in the library of the DIKs, but it was an unnecessary passage.
there is a tiny possibility that this could lead to unexpected developments: for example if Josy was having an affair with someone else (I can't imagine who) nobody could complain ...