Fiancé "needs" his mom??

So this weekend I'll be going to my best friends bachelorette party in another state, in her Maid of Honor. My fiancé will be staying at home all weekend (for the first time ever) with our 7 month old son. I've been pretty excited for this trip because i stay home with our son and could use a break and also because it will be nice for my fiancé to know how hard it can be to stay home (he constantly "jokes" about how easy it is to stay home vs working) and have no help whatsoever.

Well, today he told me he asked his MOM if she can come down for the weekend and "help" him with the baby because he said he thinks he will definitely need her help 🙄 I'm floored. Is it wrong that I'm upset about this? I never get any fucking help around here and this is his own child and he can't stay here for 2 days alone? I feel like a total bitch and I don't know how to confront him about this without sounding really mad and like a bitch.

Let me know what y'all think, the more I think about it the more I think it's just absolutely ridiculous. I'd love to be a dad for just one day!!