The context of the following conversation is Because it wasn't their time to shine, Sasha took a backseat to their coworker.:
Sasha says I feel like my boss likes my co-worker better than me..
The friend responds Well, it's true that you've been shirking your duties lately, letting your co-worker pick up the slack..
Sasha responds I just feel like it hasn't been my time to shine, so I've been taking a backseat..
The friend responds Well, that's a convenient excuse. You need to show up ready to shine every day at work..
Sasha responds My efforts don't really get recognized by my boss..
The friend responds Well, if your boss thinks you're taking a backseat, you could be fired..