GVP gives you a ride

You were alone and lost in road. GVP proposes you a lift. 
while you're in his car, your eyes see only his big bulge in his cute body.

GVP saw that you're flashing on his bulge and touches his bulge non stop to make it hard
at the end of the ride, GVP asks you to give him a blowjob to pay the ride!

Are you gonna pay or will you give an extra tip by letting him fuck you?