Kudos to your mommy, but  the expectation of equality is not envy, it is an expectation of basic fairness.  However, it can be argued that Patriarchy is about selfishness and power lust. It is based on ALL of the 7 Deadly Sins: 

Envy = the desire to have an item or experience that someone else possesses
Gluttony = excessive ongoing consumption of food or drink
Greed or Avarice = an excessive pursuit of material possessions
Lust = an uncontrollable passion or longing, especially for sexual desires
Pride = excessive view of one's self without regard to others.
Sloth = excessive laziness or the failure to act and utilize one’s talents
Wrath = uncontrollable feelings of anger and hate towards another person

You see, Tridentinus, Sexism is very very sinful!