A Fourth House Saturn suggests that your career or area of responsibility in the world relates to home and family concerns. Much work is required to overcome emotional inhibitions, early conditioning and irrational fears. Life experience will force you to learn valuable lessons related to the above issues and many domestic, family and romantic confrontations will be afforded to help hasten the restructuring process. Emotional security and self-acceptance will eventually come from a true knowledge of self and an ability to focus inwardly, away from the emotional dependency of others. Domestic security is important and your profession may involve real estate, building projects, the manufacture of domestic products or working from the home.
http://www.horoscopeswithin.com/saturninhouses.php
Kitchy's thoughts: revamped and added so as not to be perceived in ill by some for abrupt but fitting comments earlier.
Saturn is in the Moon's house. Saturn obeys, follows protocol. Or Saturn walks away cold and hard from moon when moon has not given in, because saturn is in her house and she still rules the roost, but this is when saturn usually caves to moon, because after all, saturn is all that he is because of her.
4th/10th you can't have one without the other. It's the "you're not the boss of me" ultimate showdown, and saturn caves to moon - even if it's by stepping back, giving in, and then doing nothing but making moon miserable for life because of missed opportunities.
She would have to reject her family to do this - and know that she will never meet their expectations of her in their eyes if she does.
She can teach though - boy o boy - she would make a great teacher at a university or in some international exchange - it could be theatre acting speaking sun-merc-venus.
Native has natural ability to convey what she knows in all kinds of creative artistic expressive ways.