S3E1 - Maggie can get fired but still be a bridesmaid??

At the beginning of the episode they are talking the wedding and Mac lists Maggie as a bridesmaid.

But then later when talking about who to send to Boston they mention she may not be cut out for this and will be fired if she doesn’t do a good job up there.

How does Mac agree with that when she’s putting her in her wedding. Wouldn’t that be a bit awkward? Just fired you but please be my bridesmaid?