Madonna has reportedly introduced her Brazilian model lover Jesus Luz to her children.

The 'Miles Away' singer was spotted dining with the 22-year old hunk in New York's Macelleria Italian Steakhouse over the weekend along with two of her children - Lourdes, 12, and adopted David, three.

A source said: "The chemistry was fizzing between Madonna and Jesus and Lourdes seemed interested to get to know him."

After the meal, Madonna took Lourdes and David shopping, and Lourdes - the singer's daughter from a previous relationship with fitness trainer Carlos Leon - was seen trying on several designer items of clothing.

Madonna, 50, met Jesus in December when they were paired up for a photo shoot for US fashion magazine W. She was said to be so attracted to the model she invited him to accompany her on a string of dates for her 'Sticky and Sweet' world tour. They were then photographed after a dinner date in Sao Paulo, Brazil.

Since meeting Madonna, Jesus' modelling profile has received a massive boost. He has switched agencies and the fees he can command have increased.

A source told Brazilian fashion website Glamurama: "He has started asking for $135,000 a show. He did the same job last year for a lot less.

"A lot of people are contacting him but because he keeps raising his rates, they are changing their minds."

Reports of Madonna 's liaison will come as a further blow to her estranged husband Guy Ritchie, who last week lost in his custody battle to keep the two sons the couple raise - David and Rocco, eight - with him in England.

A source added: "It would have hurt Guy to have seen this new sexy model moving in on his family."

Madonna has also been linked with baseball player Alex 'A-Rod' Rodriguez since announcing her split from Guy after nearly eight years of marriage in October last year.