updated 06/23/2014 AT 2:00 PM ET
•originally published 06/23/2014 AT 3:30 PM ET
That’s a surefire way to charm your future mother-in-law.
“They were outside, and Amal and her mom were smiling,” the source says. “It was going pretty great.”
“Amal’s mom left the next day, and at the airport they just looked so happy.”
“George and Amal looked very much in love all weekend,” the source says. “They were all smiles, holding hands. There was an air of romance.”
The pair are expected to tie the knot during a September ceremony somewhere secluded in Italy, another source told PEOPLE in May.