Age of Empires 3 question?

So I was playing a 2v2 match with the AI and my ally sent me 2 villagers. I didn't know/think you could do that? Can you do that (can someone explain how, if you can indeed do that) or was that just some random thing the AI can do?

Preston2015-06-22T09:40:04Z

Its a Home city card.
*had to change my answer cause it just dawned on me haha*