<You mean he's ... hetero? >
Most child molesters -- especially true pedophiles (pre-pubescent victims) -- regardless of the sex of the victims, are heterosexual in their adult orientation, to the extent that they have one.  Exactly how that plays out in this particular priest, or in any specific offender, is of course unique to that person.  The fact that Sigler married (assuming he married a woman) does not necessarily tell us much about his sexual orientation. None of this stuff is as clear cut as we might wish it were.