I think, in all fields, there's this motherhood pay penalty where, the second you become a mother - and this is true whether you give birth or adopt - you're perceived to not be as committed to your job. Whereas men are perceived as breadwinners who now need more money and promotions because they're fathers.
It's good for Brazilian football to have idols, stars, big stars coming back to Brazilian clubs. The tournaments become much better, more interesting. Ze Roberto, Juninho Pernambucano, Ronaldinho Gaucho, and other players who have returned to Brazil strengthen the league and improve the tournaments.