updated 01/02/2012 AT 8:00 PM ET
•originally published 01/03/2012 AT 12:05 PM ET
After spending some quality time together earlier in the day Sunday, the mother-son duo met up with Mendes to go to an AMC movie theater in uptown Manhattan.
“They all hung out and went to the movies together,” a source tells PEOPLE. “Ryan and Eva seemed very happy.”