Sis blows me while i was trying to help her with math

i have a dick riding exam tomorrow, can you help me study?

I groaned loudly as I bust my third nut of the day. Having a

Please help me with math exam

When I said I’d help you with your magic college assignment,

Help me to solve a math problem, you+me=?

I've got an idea.. Let's skip math class and fuck instead..

Help me with my homework and I'll pay with my body

Help me to solve a math problem: you+me=?

A little help please...

I'll let you suck my tits if you help me with math

Tomorrow I have a terrible exam, help me with math