Maynard James "M.J." Delfino (Mason Vale Cotton)
is Susan and Mike's son. He was born on May 11, 2008. Originally Susan
wanted to name him Connor, but later agreed to honor Mike's deceased
grandfather, Maynard. Mike's other grandfather was mentioned as being
named James, probably resulting in the "M.J." compromise. He was
bullied by Juanita Solis, which caused their mothers to have a fight,
but this has since blown over. When Mike began a relationship with
Katherine, they take M.J. out to the Zoo and bowling, but M.J.
initially resents Katherine's presence, throwing ice cream at her and
dropping a bowling ball on her foot. This is short-lived, however, so
much so that M.J. begins to prefer the company of Katherine rather than
Susan, much to Susan's distress. Mike and Susan work to get him into
private school and are successful when Susan takes a job there as an
art teacher's assistant. His life is in danger because Dave Williams
plans to kill him in order to get revenge on Susan for killing his
family. M.J. does not die after Susan got through to Dave. M.J. is seen
as the ring-bearer when Susan and Mike are remarried. He was also
unwittingly dragged into Susan and Katherine's feud, when Katherine
dared to badmouth Susan to her own son, which angered Mike.