The character of John's relationship with his second wife, Isabella of Angoulême, is unclear. John married Isabella whilst she was relatively young – her exact date of birth is uncertain, and estimates place her between at most 15 and more probably towards nine years old at the time of her marriage.[nb 15] Even by the standards of the time, Isabella was married whilst very young. John did not provide a great deal of money for his wife's household and did not pass on much of the revenue from her lands, to the extent that historian Nicholas Vincent has described him as being "downright mean" towards Isabella. Vincent concluded that the marriage was not a particularly "amicable" one. Other aspects of their marriage suggest a closer, more positive relationship. Chroniclers recorded that John had a "mad infatuation" with Isabella, and certainly John had conjugal relationships with Isabella between at least 1207 and 1215; they had five children. In contrast to Vincent, historian William Chester Jordan concludes that the pair were a "companionable couple" who had a successful marriage by the standards of the day.