Spencer Pratt Accuses Heidi Montag of "Hijacking Sperm"

Spencer and Heidi plus one?

Not if Spencer Pratt has anything to do with it!

In this clip from Tuesday's season finale of The Hills, Pratt has a basketball-court chat with pal Brody Jenner about his wife Heidi's sneaky attempts to get pregnant -- with or without his consent.

"There's a chance that I'm about to be Pratt Daddy for real," he tells Jenner, noting that he found a pregnancy test in the trash.

"It's like a sperm kidnapping," Pratt complains. "Like hijacking sperm!"

Adds Jenner: "Scary."