Big Bang Theory Boss Weighs In: Did Leonard and Sheldon's Parents Hook Up?

We've long known Judd Hirsch would play Leonard's (Johnny Galecki) dad in The Big Bang Theory's Season 9 finale, but what we couldn't have seen coming was that he'd hit it off with Sheldon's (Jim Parsons) mom Mary (Laurie Metcalf).

Could they be about to make their sons literal bros in Season 10?

Alfred and Mary discovered they were staying at the same place, decided to have a nightcap and split a cab.

[...] this leaves out any mention of Sheldon's long-awaited proposal to Amy (Mayim Bialik) or Bernadette's (Melissa Rauch) baby bump watch but you know by now those omissions weren't accidental.