Hopefully she will wait until you get home
.
On a side note - Chloe would pant seldomly a few days before she had the pups. On Sunday, I left to go to a bridal shower. She wasnt panting until about 5 minutes when I got home and I thought - Oh, no, please dont go now - I have to go to work!! So, I left for work while my fiance watched her. He said there was no panting, nothing while I was gone. I got back at 11 pm and she started panting again - sure enough, around 4 am she was waking us up!
Whether she wants to go while you are there, or while you are at work, I am sure that everything will work out fine. Just have the dog/puppy-sitter keep a camera on-hand incase you are not home right away!