A nun was walking in the convent when one of the priests noticed she was gaining a little weight. "Gaining a little weight are we sister Susan?" he asked.

"No, Father. Just a little gas." sister Susan explained. A month or so later the priest noticed that she had gained even more weight.

"Gaining some weight are we sister Susan?" he asked again. "Oh no, father. Just a little gas."

She replied again. A couple of months later the priest noticed sister Susan pushing a baby carriage around the convent.

He leaned over and looked in the carriage and said, "Cute little fart."