Katie Holmes has hardly left Tom Cruise's side since they began dating in April 2005.

However, that support has caused her much grief.

According to one Hollywood insider, the actress, who gave birth to daughter Suri Cruise last year, has been told by her kooky husband to attend "mommy classes" taught by Scientology "handlers."

"There are parenting classes," a Scientology source confirms.

"Katie Holmes was quite offended by that," the source tells Us Weekly.

"Can you imagine when you're 28 and have your first child to be told you need to go to this church to become a better mom?"

Holmes now finds herself surrounded by fellow Scientologists, an exception being Victoria Beckham, who one Hollywood insider describes as "her link to the outside world."

Wow. We've talked before about Holmes' battle and how she is a prisoner without bars. But when Victoria Beckham is your link to the outside world ... that's pretty f*%ked up.

From the time TomKat began dating, the actress - who, pre-Tom Cruise, did interviews without a publicist - has been assigned a Scientology "minder," whose job, according to a Scientology expert, is "to make sure that nothing is said or done that would be critical of the church."

In fact, virtually everyone on the couple's staff is a member of the Church of Scientology.

"Everyone who works with Tom is technically minding Katie," a source dished.

So why does Katie stay? What will Suri Cruise's life be like growing up as a Scientologist? What did Tom's ex, Nicole Kidman, think about all this?

Only time will tell, celebrity gossip followers. Only time will tell.