[SQLObject] Storing object from same table

Hello, sorry if I use the wrong terminology, I just started with SQLObject
and databases in general.

This is my current class:
class Person(SQLObject):
    name = StringCol(notNone=True)
    father = StringCol(default='')
    mother = StringCol(default='')

This stores the names for the person's father and mother, but when I want to
access their data, I need to fetch their names first and then lookup their
objects from the database. What I actually want, is that father and mother
are references to their own Person object. Is something like this possible?
I read about SingleJoin/MultipleJoin, but it always references to another
table.

Cheers,
Timo