Newly married Spencer Pratt is working on a nice healthy relationship with his mother-in-law.

Responding to Mama Montag's not-so-nice words, in which she says she believes Spencer drugged Heidi to the altar, Pratt responds by saying he can't wait to prove Mrs. Montag's shortlived wedding predictions wrong. He said that he and Heidi are going to be "married for the rest of our lives."

Talking to Ryan Seacrest's radio show, Pratt said, "I'm sure she's just hurt and reacting crazy because she wasn't there."

Because a mother wouldn't want to be present at one of the most important days of her daughter's life - duh!

And Spencer saw his mother-in-law yesterday, Wednesday, to tape a scene for The Hills.

And how was it?

He said it "was pretty much the most insane day of my entire life."

And will the happy couple be spending Christmas with the Montags?

Pratt said, "The Pratts - as in Heidi Pratt and Spencer Pratt - will probably have their own Christmas tree."

You can listen to the rest of the phone call here.

[Image via Apega/WENN.]