I forgot to take the week of the 28th off because my family is coming up from TN and I have three…

I forgot to take the week of the 28th off because my family is coming up from TN and I have three baby showers and the my three little siblings are staying with me so I don't want to leave them at home for work. I'm hoping they will let me just take the week off rather than having to use my maternity leave excuse. I'd like to come back and work for a few weeks before I stop