i think they'll be really good for one another because shosh isn't particularly warm at all but she does have a similar dry wit, and she's pretty much the opposite of naive so she'll be sure to give rhea a reality check when she needs it! for various tl;dr reasons she feels completely sullied towards the idea of weddings so i feel like she'll be morbidly fascinated with rhea's job and insist that they play the game of "let's guess which of your clients this week will get divorced first". i think a part of her will also be envious that rhea has a job she loves so much, because shosh honestly hates teaching most days but feels stuck in the profession and unqualified to do anything else. i think they'll be a really good support system for one another though so i'd love to say they're close friends!