Make your displeasure clear to Mia.

Before Mia can say anything you whip out your 5in erect cock, and shove it into her slut mouth. "You cheating whore!" You say as you begin to fuck her mouth.

Mia responds with a muffled noise of shock mixed with the gagging of you face fucking her, and your mother looks at you with a bit of surprise before getting a wicked smile on her face.

You shout to Mia "God you will just take dick from anyone won't you, I don't need some moralless human cock sleeve for a girlfriend." As you grunt pumping your cock like an animal in and out of her throat, and low and behold her shock noises begin to turn to moans of pleasure, you grit your teeth "You slut you are enjoying this aren't you!"

You mother grabs Mia's hips and lines her fat cock up with Mia's asshole, gently pressing against the entrance, "Looks like my son has you pegged Mia, and to think you thought you were gonna be his wife. No, you are just gonna be nothing but a cock sleeve, but part of you likes that doesn't it?" Before Mia can even try and give an answer your mother slams her cock so hard in her ass, you can her the impact of her balls slapping against Mia.

Mia just seems to love it though so you just fuck her slut mouth even harder, ravaging her throat while your mother ruins her asshole. She looks up at you in ecstasy and you look down in disgust at this cocks sleeve and spit on her face, as your mouth spanks Mia's ass good and hard.