I worked with a girl like this before. I covered for her 3 times and he never repaid the favour so from then on it was a flat no.

Even then when the manager asked me to cover a shift I wouldn't give an answer until she told me who i would be covering for, and once again, it was a flat no if it were her.

She's a woman, what did you expect--honor? hahahahahahaha

I always liked working on sundays. You get paid double while things are usually quieter.

I do not get paid double for browsing drama at work on Sundays.

it's not a thing where you're from? or just not at your job? Here you get 200% for holidays and sundays, 150% for saturdays.

I only get paid for federal holidays, 250%. Nothing extra on weekends, nights, or weekend nights.

Damn. Your job is shit.

I used to give all the shifts I didn't want to my coworker who had kids and really needed the money. The key to shift switching is leverage.