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By the size of Jessica’s enormous bump, it seems like she could pop any second. But her sister says no way!

Ashlee Simpson, 27, wasn’t worried in the slightest when she was in Australia on March 29 because she knew she would be back in time before her older sis Jessica Simpson, 31, gives birth because she has “plenty of time” before the big event.

The mom-to-be even thinks she has a few weeks left, according to US Weekly. Last week, Jessica was overheard telling a Fred Segal shopper that her bun in the oven isn’t ready yet with the baby’s daddy Eric Johnson, 32.

Whether they are right or wrong, all we can do is wait for the little bundle of joy! Do you think Jessica really has weeks left?

–Giovanna Pagliarulo

More Jessica Simpson News:

1. Jessica Simpson’s $2 Million Delivery — Bigger Than Beyonce’s
2. Jessica Simpson’s Gained 50 lbs — Too Much Say Obstetricians
3. Jessica Simpson’s Pregnancy Fashion: Her Big Hits & Major Disasters — See Pics