Naturally, it was assumed that Róza was the one expecting — she was the one in the relationship. But since their bodies were conjoined, Josefa had to endure everything too — from morning sickness to labor pains.

On April 16, 1910, a strong, healthy baby boy was born. He was named Franz after his father. Destiny once again showed its odd hand: both sisters produced milk and nursed the baby together, protected him, and raised him.