Justin Timberlake is very protective of his two-month-old son, Silas.

The 'Mirrors' hitmaker's wife Jessica Biel is reportedly frustrated that they ''hardly ever go out'' because he is so anxious about protecting their baby's privacy.

A source said: ''Justin means well. But Jessica is getting annoyed because they hardly ever go out.''

The 34-year-old singer is also determined to make their home as safe as possible and only trusts his mother to babysit.

The insider told US Star magazine: ''Justin makes sure the security cameras are working every morning and he insists Silas sleep in a crib beside the couple's bed.''

Another source previously revealed Justin is excited to be a father, saying: ''Justin is so excited, he doesn't know what to do with himself!''

The duo spent their first few weeks adjusting to parenthood at their home in the exclusive Yellowstone Club in Big Sky, Montana after Jessica gave birth in April, but recently moved back to Los Angeles.

The source added: ''Their house is all set up for the baby. They want to raise him out of the spotlight.''