Here's my attempt at a family tree: The Plantagenets and the Many Mistresses. Let me know what you think :)
Edward IV, King of England, b. 1442, d. 1495 married firstly a) Marie de Foix, b. 1443, d. 1466; married secondly Mary of Scotland, b. 1453; relations with Mabel Parr, b. 1450; relations...