Madonna is "on edge" about meeting her boyfriend's parents.

The 'Celebration' singer is set to fly to Brazil to meet her 23-year-old boyfriend Jesus Luz's mother Cristiane Regina da Silva and his father Luis Heitor Pinto da Luz, sparking rumours the celebrity couple are about to get engaged.

A friend of model Jesus said: "She is slightly on edge. But an engagement could be on the cards."

Jesus - who has been dating the pop star since late last year - is desperate to be "taken seriously", get married and secure their relationship.

The pal added: "Madonna really does love and need Jesus - and she does not hold all the power in their relationship. He grew up with strong Christian beliefs.

"He wants to marry and be taken seriously. She doesn't want to lose Jesus and so the visit to his parents is her way of saying she will make this relationship permanent.

"He wants proof of commitment and he wants her to make an honest man of him."

The meeting proves the pair have put their recent disagreement behind them.

The couple reportedly rowed after Madonna - who has children Lourdes, 12, Rocco, nine, David Banda and Mercy, both four - said she would rather be "run over by a train" than marry again following her split from movie director Guy Ritchie, with the model begging his 51-year-old love to rethink her vow.

According to the singer's biographer Randy Taraborrelli, she has already had a change of heart.

He said: "Madonna is telling close friends and family that 'I definitely see myself marrying him. It's on the table'."

If the nuptials go ahead, this will be Madonna's third wedding. She was also wed to actor Sean Penn between 1985 and 1989.