Robert Cheesman - Robert has a son at age 12?

I have= Robert Cheeseman 1485-1547 ~ Married Alace Dacre on __ and then Elanor Owlett on 05/05/1523

Children of Robert 1485 =
John 1507-1577
Robert 1510 ~married Magdalen Eleanor Dacre 1528 -1608
Eleanor 1520-1558
Anne 1530 - ____ This Anne married Sir Francis Chamberlain 1542
Raaf or Ralf? 1532 - ___

I have Robert 1510 and wife Magdalen Eleanor Darce 1528-1608 living in Kingston, Surrey, England
and his children being:

John ~ 1548-____ married Margaret (Swainton) Cheesman 1563-____ and lived in Kingston, Surrey, England.

So, Robert 1510 would have been 38 at time of Johns birth and Magdalen would have been 20 yrs old.