The ultimatum comes after Justin has landed in hot water (once again) following claims he caused over $20,000 worth of damage on a neighbours house during an egging incident.
A source told Yahoo: ‘Selena has told him 'no romance without new manners', and insisted that he should take a course in anger management.’
‘Selena is an old fashioned southern girl from Texas and believes in manners and good behaviour, she's told Justin that he has to mend his ways if they are to start seeing each other regularly again.’
The couple were rumoured to be back ‘on’ again after being spotted together over the festive period.
Justin added fuel to the rumours by posting an intimate Instagram pic of him and Selena cuddling.
Pop's resident bad boy recently announced he is retiring from music, whereas Selena cancelled some of her tour dates to spend some time on herself, leaving them ample opportunity to get to know one another again.
‘Selena has been on her own and what she calls ‘on the road', but she hasn't stopped fancying Justin. She just wants some 'please's, 'thank you’s as well as some good behaviour if things are to get serious again.'
The source continued: ‘She has told Justin he needs help with anger management and that he should book classes.’
It looks like Justin will have to smarten up his act if he wants to impress the women in his life.
‘Justin’s getting it from all angles now. His mum, Patti, wants him to start becoming more mindful of his behaviour and now Selena has given him an ultimatum.’