You are writing a story it can be a factious as you want to make it, but in reality no...... Kings did 'sell off' their daughters often when they were very young...
Sir John, created Baron Harrington at the time of the coronation of King James 1st. of England.Lord Harrington owned Coombe Abbey in Warks, Burley Hall and Exton Hall in Rutland. Sir John had found favour with the new King when he entertained him at Burley House on his journey south from Scotland to take the throne of England on the death of Queen Elizabeth I in 1603.
This elevation became a mixed blessing when he was made guardian of King James' daughter, Elizabeth, who was 5 years old. The high cost of entertaining, educating and bring her up ruined him. He was driven to minting his own money, made of brass, but this was valueless, leading to the saying "not worth a brass farthing".
In 1612 Frederick, the Elector Palantine arrived in London to marry the Princess this was not a 'love match' but an agreement which enabled peace between countries in Europe, and I am sure several potential suitors would have been around at that time but who would pay the King what he wanted for her and what country was it best to have peace with?Within three weeks the Princess’s brother Henry, Prince of Wales had died of typhoid leaving his brother, the future Charles I as heir to the throne. The wedding was delayed until the following year. Lord Harrington, now 73 and in poor health was obliged to undertake his final duty in escorting the Princess to her new home in Heidelberg, Germany. After the Princess married the Elector Palatine she became the Queen of Bohemia.
This young Princess while in John Harrington care/guardianship in 1604 just before the Gun Powder Plot... Guy Fawkes became involved with a small group of English Catholics, led by Robert Catesby, planned to assassinate Elizabeths father Protestant King James and replace him with her who was then third in the line of succession, Princess Elizabeth, she was born in 1596 so was only 8 years old at the time and 15/16 when she was taken to be married
http://en.wikipedia.org/wiki/Elizabeth_Stuart,_Queen_of_Bohemia