I want to do something nice for my mom.....have to do it before she gets off work!??? help????????

she alllllllways comes home in a bad mood because she HATES her job!! she never gets a break from that place! i hate the fact that because she hates it there she always comes home in a bad mood! she just left for work and i have til four oclock before she gets home.,..... so i wanted to do something nice for her! and the house is already clean so i cant do that??? some one help me??????????