A brain teaser, Wesley’s mom discovered a broken window in the living room and went to ask Wesley about it. Wesley told her he had been playing Monopoly with his friend Cindy. See comments?

Wesley’s mom discovered a broken window in the living room and went to ask Wesley about it. Wesley told her he had been playing Monopoly with his friend Cindy. She asked him what his last roll had been and he said, “A one”. She immediately knew he was lying.

How?

I've never played Monopoly but I assume it's played with 2 die. And so the lowest incriminate that he could roll is 2, 1 would be an impossibility.  This is how she knew he was lying.