If the Duchess of Cambridge's uncle is to be believed, Kate Middleton and Prince William are likely to expand their family further, particularly if their second child is also a boy.

In a recent interview with Hello Magazine, Kate's uncle Gray Goldsmith said, "I don't think they'll stop at two, so if it isn't a girl this time round, people shouldn't be too disappointed," adding, "I'm sure there'll be a girl in the mix at some point."

E! News reports that preparations are already underway in the British royal family to welcome the second baby of Kate and Prince William, which is due later this month.

In the mean time, one and all in Kate's hometown Bucklebury, Berkshire, have predicted that the second baby of the Dutchess and Prince William will be a girl. According Us Weekly, there have been several reports over the last few weeks that claimed Prince George will have a sister. Nevertheless, Kate and William have asserted that they do not know the child's gender.

Since March 28, Kate has been on maternity leave and is apparently abstaining from her royal duties for a longer period with a view to "fully enjoy the bonding experience" with her two children. On the other hand, Prince William has commenced his unpaid paternity leave after finishing training with the East Anglia Air Ambulance. The 32-year-old Duke of Cambridge will be returning for the second phase of his training on June 1.

While final preparations begin for the royal baby, currently, the royal couple is residing at their home in Kensington Palace. Kate will give birth at St. Mary's Hospital in Paddington, where the Duchess gave birth to Prince George in July 2013.

Various reports have stated that Kate's mother Carole Middleton will help her daughter as she manages the two children.