At the ages of 17 and 19, Justin Bieber and girlfriend Selena Gomez may have thought it's a tad too early to be thinking of starting a family of their own.
And after a second day baby-sitting Justin's two year-old brother Jaxson the teen pop sensations certainly looked like their enthusiasm was flagging.
Yesterday the famous teenage couple were having a whale of a time as they played with two year-old Jaxson and four-year-old Jazmyn at Paradise Cove.
But today the pair appeared frazzled as Justin lifted the two-year-old tot, and all the necessary gear that accompanies him, out of the car and into a restaurant for lunch.
Justin and Selena were spotted taking Jaxson out for a meal at Benihana Japanese restaurant in Los Angeles.
The restaurant is a haven for parents as the teppanyaki style cooking features noisy communal tables and chefs that perform tricks such as knife juggling and making volcanos out of a stack of onion rings guaranteed to keep even the most fractious child entertained.
Selena, wearing a leather waistcoat and ripped jeans, looked tired and walked ahead leaving Justin to grapple with little brother.
