just maybe Irma is just used to being the center of attention and stella is a woman that can get as many guys fawning over her and it is causing a conflict
i think it happened the other night when Irma and stella came home and Irma was mad at stella i figure it probally happened at the club and Irma had to watch her fuck her sugar daddy
just guessing but maybe stella fucked a#%x the other night that's why Irma was mad at her,and that's who stella keeps talking to and he sent flowers to Irma to apologize like i said its a guess but it fits