Yes

"Open your mouth Florence."

"No, are you crazy you can't..." voice of your mother sounds hysterical which shouldn't surprise you considering the circumstances.

"Jack, choke her" he orders your brother.

"Jack you are my son, you can't..." she is quickly cut off.

All what you hear now are her struggles for breath, but after a moment you have no doubt what's happening. Your mother gave in, you can clearly hear slurping.

"Good choice, honey" says your father "yes very good, make your son feel as awesome as you make me feel."

He stands in front of you.

"You understand, now Emily?" he asks and you nod "so, suck my dick my whore daughter."

You open your mouth and without any consideration for your discomfort he forces it inside.

"If I feel the teeth" he threatens "I'll spank you so hard that you won't sit for a week."

That threat is enough to make you really careful, but you can't do anything about gagging. He's too rough and his dick is too long, it touches your throat.

"Ahhh..." meanwhile your brother moans "that's...great."

"You already finished?" your father is surprised, but it doesn't stop him from fucking your mouth "you'll have to do better in the future. But we have time."

He is fucking your mouth obviously without caring about your discomfort, or maybe it even increases his pleasure.

"You...disobedient...little...whore. I told you not to do this and you have to disobey."

The tears are starting to form in your eyes, but he doesn't seem to care, maybe even it makes it better for him. When he finally pulls out and with a "ooh" he covers your face in his cum. At this time you feel so weak that you don't even think about freeing yourself, you are exhausted and humiliated.

"You have some uses after all" he says "you wanted your mother help, right? You'll get it."

He walks to your mother and frees her from her restraints.

"Now Florence, you'll lick my cum from your whore daughter's face. Don't try anything stupid."

But your mom doesn't plan to go down without a fight. She tries to escape by dashing to the door, unfortunately your brother catches her. She probably wouldn't manage to escape anyway.

"Florence, Florence, Florence. I can understand Emily, it's partially our fault that we have raised such a stupid whore. But you should be smarter. If you try something like this again I can still sell both of you. To make the message clear I think you deserve punishment. Jack, light up some candles."

After few minutes he takes two candles and throw wax on your mom body, she screams. When all candles are burn out he takes her face in his hands and asks:

"You will be good now, right sweetie?"

She nods her head and when he let's her go, she quickly takes care of his cum that still covers your face.

"Good. Now share it with her."

"I'm, sorry sweetie" she whispers and you two share a kiss. You know that resistance is pointless so you taste some of your father's cum. Somehow you think that it won't be last time you are doing it.