We went from thinking Scarlett Johansson was preggers with Sean Penn’s baby just two short months ago to this week’s news that couple are already kaput.

Despite their 24-year age difference, we thought these kids could have had a shot at making it last, well at least for another few months or so, what with their shared love of Cuban food, humanitarian work, jogging and snogging in public places.

So after ScarJo had just moved into Sean’s Malibu pad, what went down to make the couple go their separate ways?

Nobody in Camps Penn or Johansson is saying, but we have a few goodies:

The first being that despite Penn’s gruff outward appearance, the guy is actually a family man/mama’s boy at heart (Mother Penn does live less than a mile away) and that some members of the fam urged him to purge the young starlet, who is just a few years older than his children.

We doubt the private Penn clan enjoyed the media frenzy and stalkerazzi that came out of the woodwork when ScarPenn united forces.

And besides, we secretly think (and hope) that Sean still loves ex-Robin Wright, who recently called it quits with her boyfriend, so perhaps she influenced her former hubby to give the new blonde the boot?

“Yes, of course Cheryl will be on the American show, she did auditions in two cities and we will reflect that. We did the same with Brian Friedman on the UK show.”

An insider added:

“If Cheryl is made to look like a guest judge or an experiment that went wrong it would have big implications for her career and could kill her American dream. Being dumped from the show has been bad enough, I can’t imagine she will be looking forward to reliving the auditions on screen.”