A well-established sitcom trick is to get the mom out of the equation and let comic mayhem ensue. ('Full House,' anyone?) Because women are no fun and men are terrible parents harharhar (*stereotypes FTW.*)
'Blossom' took it to the extreme -- the Russo family mom had left home to have her own life, leaving Blossom, her two older brothers and her dad to fend for themselves (she didn't even have the heart to die like the awesome mom on 'Full House').