It seems on set all was fine between the two actors they were even friends.
I’m happy for her."
So what happened to drive the two now-moms apart?

Thiessen admitted to Stern about the couple’s split, “It was a hard situation for everybody.
We were close with Charlie… my best friend was Charlie’s roommate.
It was hard” (viaPage Six).

But she insisted she was the one who got hurt by Spelling, not the other way around.