Up until that point, there has been no credible evidence or official statements suggesting that Kate Middleton, now known as Catherine, Duchess of Cambridge, had a specific desire or intent to marry into the British royal family.
Catherine met Prince William while they were studying at the University of St Andrews in Scotland. Their relationship developed over time, and they eventually got engaged in November 2010. The couple got married on April 29, 2011, in a highly publicized and widely celebrated wedding.
It is essential to respect the privacy and personal motivations of individuals, and as such, any claims about Kate Middleton's intentions regarding her marriage to Prince William should be approached with caution. People's motives for their personal choices are often complex and multifaceted, and it is not appropriate to speculate on them without reliable evidence or statements from the individuals involved.