GF vs her StepSibling! Pick your slut

Description: Part 3 of the homewrecked by your gf's stepsibling series! your girlfriend finally found out you've been fucking and cumming raw inside her stepsibling, and she's upset about it. her stepsibling comes home just at the wrong (or right?) time and suggests they compare their bodies so you can pick between them, then fuck them both and choose the winner by who you cum inside. can you choose? who will you knock up? both stepsiblings are played by me!