Allison opened her mouth to argue, before closing it again - she couldn't argue with that logic, because every point he made was true. It didn't make sense to move Stiles around while someone covered his job, especially when Allison knew that she was still relatively surplus when it came to having a specific job.
"Just tell me - would you have made the same decision this time last week?" She asked carefully, turning her attention back to Derek, rather than looking at the baby - he was cute, at least. "I've never even held one before, Derek, I don't know if this is a good idea."