Weird thing to end a friendship over though lol considering they were ‘besties’I’m not one to big up syd on here (see previous posts for evidence ha) but if Molly legitimately was sleeping with her new bf whilst he was still with his ex and her and syds fallout was a result of syd calling her out on that, then fair enough. Similarly to how she fell out with Lucy after she took her cheating ex back after Syd and ell helped her through the breakup.
You can disagree with your friends lifestyle choices and still remain mates- it’s seems like high school behaviour to end a friend ship if they’re doing something you don’t agree with.
If I ended a friendship every time one of my mates stepped out or went back to a guy who fucked then over I’d not have many mates lol