Would I be an asshole if?

I work at a daycare for those of you who don't know. And we are understaffed. I work with the babies, which has 6 kids enrolled currently. And a teacher is only allowed to watch 4 babies at once. So we have two teachers for this room. We'll this morning the other teacher told me she's thinking of calling out tomorrow to spend time with her daughter who's home from college. But this is annoying because that's not to me a reason to not come in. Of that was then I'd everytime my boyfriend was on town use him as an excuse to not work. She has the weekend with her kid. But I had to tell her it's fine, because of I don't she'll be mad. Bit would I be an asshole to be honest and tell her it's not fair. That she needs to come in because that's shitty to me. Especially when she was just out for a week saying she was sick

Updates
2 mo
Well my idiot boss let her take 2morrow off. So im gonna be stuck with all 6 babies
Updates
2 mo
by the way to make it even more annoying she lied Monday her kid missed the bus just to take that day off as well
Would I be an asshole if?
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