A woman has begged her estranged husband to "please, please come out of hiding", after he disappeared with their six-year-old son.
Leyla Dad today told husband Zayn Dean: "We can sort this out between us."
Ms Dad, who is Polish and uses her middle name, Paulina, has launched proceedings in the Family Division of the High Court in a bid to trace son Mani.
Solicitors representing Ms Dad say Mani disappeared from his home in Kielce, Poland, in January. They think that he is in the UK with Mr Dean, 47, who is British and also known as Dholtana Dad.
Ms Dad, 33, has written a public letter to Mr Dean in the hope that he will come forward.
“Dhol," Ms Dad has written. "I am writing this letter in the hope that you see it and that it makes you think long and hard about what all this must be doing to Mani.
"I would never do anything like this to you. You said that you were going to take him on a short holiday to Warsaw. I never for a moment believed that you would take him from me and refuse to give him back.
"Mani, our beautiful baby boy, is only six years old and because of what you have done he has been separated from his mother for six months. Mani has never been away from me for this long.
"I am begging you, please, please come out of hiding. He must be terrified. I can’t comfort him, cuddle or kiss him. I can’t tell him that I love him or tell him everything is OK.
"Please tell me where you are and where our baby is living. Don’t do it for me, but do it for Mani, our precious son, who means everything to both of us. We can sort this out between us.
"I also make a desperate and public plea to anyone out there who reads this letter and has seen you and Mani to come forward to tell me where you and Mani are. My solicitors are Dawson Cornwell in London. You can also go to the police."
She added: "I beg any parents especially, as mothers and fathers, who might have any information to please let me, the police or my solicitors, have it."
A judge gave Ms Dad's legal team permission to disclose detail of the case in the hope that members of the public can help find the youngster, following private family court hearings. Detail was first released last week.
Lawyers said Mr Dean had family links to Bedford and Kettering and he was a businessman involved in property.
They said the couple married in England in 2008 then moved to Poland in 2013. Mr Dean returned to England last year and Mani stayed with his mother in Poland.
Ms Dad agreed that her estranged husband could take Mani on a ''short trip'' to Warsaw in January this year, and she kept Mani's British and Polish passports.
''The mother spoke to Mani on January 5 2015 and the father was due to return Mani to his mother's care on Tuesday January 6,'' said Ms Dad's lawyers in a statement last week.
''However the father did not return Mani as agreed. Instead, on 6 January the mother received an email from the father telling her that he and Mani were on their way to the UK via Germany. He told her that he had obtained temporary travel documents, for Mani.
''It is still not known how or if travel documents were obtained for Mani, enabling the father to remove him from Poland and bring him to this jurisdiction.''
The statement said: ''This is a desperately sad case involving the removal of a very young child from his home in Poland and separated from his mother who has been his primary carer from birth.''
Lawyers said father and son had not been ''seen or located'' since January and Mani was ''wrongfully removed'' from Poland.
They said Ms Dad had begun legal proceedings under the 1980 Hague Convention on Civil Aspects of International Child Abduction.
Mr Justice Bodey gave permission for detail to be released to the media after analysing the case in a private hearing at the Family Division of the High
Court.