Here is my scenario..
[FONT=Arial, sans-serif]Aldona married Casimir III of Poland, when he was 15 or 16 years old. The bride was probably of about the same age. The marriage took place on 30 April or 16 October 1325 and was a purely political maneuver to strengthen the first Polish–Lithuanian coalition against the Teutonic Knights. Casimir was seeking allies in the dispute over Pomerania with the Order. Gediminas had just undertaken an unsuccessful attempt to christianize Lithuania. The details of the agreement are not known; however, it is known that Gediminas released all Polish captives, numbered at around 25,000, who returned to Poland. The importance of the marriage was attested by the fact that Wladysław abandoned his earlier plans to marry his son to Jutta of Bohemia. The alliance was put into effect when joint Polish-Lithuanian forces organized an attack against the Margraviate of Brandenburg in 1326. However, the coalition was not strong and collapsed c. 1330. On 1335, Aldona of Lithuania showed signs of pregnancy, she gave birth to two healthy boys named Boleslaw and Wladyslaw, and the last child of Aldona of Lithuania would be Sophia of Lithuania on 1340, however after a year, Aldona of Lithuania would die on 1342.[/FONT]