Jude Law was elected the sexiest father this year (FILF), and as well as we call women with children for MILF, there ought to be a similar expression for fathers- they're hot, too.
"Father I'd Like (to) Fuck"
Fathers, whether married, separated or divorced, that a female individual sees as physical attractive enough to want to have sexual intercourse with them. Just cuz their dads doesn't mean that they don't need a spark in their love life.