There's a short conversation between Lorne and his mother while they're in the kitchen that pretty much boils down to:

"He seems like a very nice young man."

"I think so."

"Is it serious?"

Pause. "Yeah, it is."

"Good. I like him."

And then they're back in the dining room, and Lorne sets a slice of apple pie in front Jack with a satisfied grin before taking his seat.