The pregnancy rumors started after Jen posted a photo where she showed off the results of an intense pumpkin carving session. In the photo, she's holding a large pumpkin on her lap. The pumpkin has a door shaped hole in it, as well as some windows carved around the outside. Sitting in the door is a smaller pumpkin with a face of its own. “When you and your jack-o’-lantern share a vibe,” Jen wrote in the caption. 

The combination of the photo and the caption led to speculation almost immediately. “Wait … are you pregnant?” one Instagram commenter asked. “Does this mean there is a little Jennifer [coming]?” another inquired. It's easy to see how the speculation started in retrospect, but Jen made it clear shortly thereafter that pregnancy was not her intended message.