Pretend not to know Erin

Thinking fast, you raise your voice and shout back at Erin.

"First of all, she's not old OR a whore," you begin, still pumping your cock into Mom's mouth. "Second of all, my brother's loads are already spoken for. He's not spending a second with you."

"Marcus, what the fuck?" Erin's ****-glare leaves Cassidy and locks on to you. "I just blew--"

"--Your only chance at getting a donation from either one of us. Now go beg for medicine somewhere else, okay?"

"I... You... I can't fuckin' believe you assholes!" Erin fumes for a moment before taking a step back, retreating onto the patio. "Cassidy, we are done." With that, she storms off.

"Just because you smiled at him in class doesn't make him your boyfriend," you shout after her, loud enough to convince Mom but just quiet enough that she doesn't make out the tail end.

After that, the kitchen goes quiet for a moment; the only sound is your half-hard cock sliding between Mom's lips. A while later the gate slams shut, and Cassidy lets out a sigh of relief.

"Good riddance," you grumble semi-convincingly, shooting him a wink. "Girls these days are so entitled! She thinks that just because she's hot, she can stomp in here and demand our cum?"

As you release your grip on Mom's head she pulls back, releasing your totally-spent member with a pop. Then she looks up at you, her expression a mix of happiness and concern.

"...Aw... Thanks, baby," she says, licking some stray juices from her lips. "You might have been a bit harsh with her... But still, thanks for turning her away."

"Oh, of course! Our medicine belongs to you, and only you."

"Th-thanks. Can I stand up now?"

"...Oh, yeah. I'm pretty much spent. Cassidy?"

Your brother nods, offering Mom a hand. "Just busted down her throat twice. I'm good for now. Gotta have some orange juice or something, or I'm gonna pass out."

Once your mother's on her feet, Cassidy rushes off to grab some food. As you clean up your own breakfast, you notice that Mom's awkwardly fiddling with her nightgown; she's having trouble getting the disheveled and slightly cum-stained garment back into place.

"Don't bother with that," you tell her. "That outfit's fine for hanging out with Dad, maybe, but it's time to put on something more appropriate for a day with your sons."

"Do, um... Do you think I could wear something a little more, uh... Modest, just for today? Normal clothing, like I used to wear?"

You shake your head sadly. "Sorry, Mom. If you're not dressed appropriately, Cassidy and I won't be any state to administer your treatment. Not as much, anyway, and every drop counts." You shake your cock for emphasis, splattering a few drops of cum onto the floor. "You know that, don't you? How important this is?"

"...Yes, baby... I'm sorry, I'm just so forgetful sometimes--"

"Right, and that makes it even more important that we get you something slutty--Uh, appropriate to wear, ASAP. C'mon!"

With that, you grab your mother's arm and lead her toward the stairs.