The Blind Side star admits her mum Helga forbid her from joining friends at social gatherings and she was lucky to even go to her high school dance.
She says, "My mother was very strict but rightly so, I think. She just didn't want me in a car with any boys whatsoever until I was 18... I was allowed to go on a date twice - to a dance. But I had to call every 20 minutes. (I had to go) to the payphone. Helga would have shown up at the school, which she did as well, when she didn't hear from me."
But Bullock admits she's turned into the same overprotective parent since becoming a mum to adopted two-year-old son Louis - and she's beginning to follow in her mother's footsteps.
She admits, "I don't hover, but... he's always in a helmet and in this bubble that I keep him in."
The Blind Side star's late mother, German opera singer Helga Meyer, always served the delicacies over the holiday season and Bullock is determined to continue the ritual, despite strict regulations about bringing animal products into the U.S.
She tells U.S. host Jay Leno, "Since my mother passed, we break the law, because we have to manage to smuggle German sausages into the country, and apparently bringing meats across the waters is against the law.
"You fry 'em up with some sauerkraut and potato salad, but they have to be the right ones. We just have to break the law a little bit, but eventually someone's package gets through.
"I'm not at liberty to divulge how we smuggle the sausage."
In Rita Harrison's 1961 separation documents, filed in Alabama, she accused John Bullock of repeated violent behaviour, according to U.S. publication the Globe, which obtained the file.
In the papers, Harrison's lawyer claims Bullock "committed violence on her person" and "periodically flew into fits of rage".
Harrison says, "He frequently demanded that I divorce him and told me that if I didn't that he was going to get a divorce from Reno (Nevada) and I would be cut off without anything."
Bullock's ex-wife also suggested he was an unfit father to their two daughters, Nancy and Katherine - Sandra Bullock's half-sisters. She suggests her then-estranged husband never "seemed to assume or take on the responsibilities of the children," adding, "He always seemed annoyed by family life".
After the divorce, John Bullock met and fell in love with Sandra's mother Helga while he was working in Germany. His first wife, who is now 94 and living in Oregon, moved to Florida to bring up the couple's kids.
John Bullock's eldest daughter, Nancy, now 62, tells the Globe, "What happened between my mother and father was a long time ago, and water over the dam. We've all moved on with our lives."
The news of the bitter divorce comes just six months after Oscar winner Sandra split from her husband Jesse James over his infidelities. The couple is now divorced.
The 45 year old insists it took her years to come to terms with the death of German opera singer Helga in 2000 - and she still struggles to cope with the loss.
Bullock says, "It took me two years to accept that she's not here. It doesn't get easier; it gets harder. But it's a good thing, because I feel it and I value it and I'm not rushing through life."
One method she has found to deal with the grief is by using her power to help other women suffering from cancer.
The Blind Side star adds, "I love to do things that continue what she started, whether it's making candles or creating a place for women going through chemotherapy to spend time with their families."