Well, according to this website http://www.genealogics.org/getperson.php?personID=I00430168&tree=LEO
Katherine's husband's grandfather was born in c.1464, which would make him about 65 when Katherine married his grandson in 1512. He married Anne Cobham in 1477 and Edward's father was born 'before 1488' apparently. Edward's parents married in 1496, so even if Edward was their first son he can't have been more than thirty-three in 1529, let alone in his sixties!
says that Edward's father Thomas was born in 1494, which would indicate that Edward wasn't born till 1508-1510 at the earliest, which would make him quite young when he married Katherine.