You picked up the call.

You stared at the screen for a moment before putting it to your ear.

"Hello?" you answered. Your aunt stopped what she was doing, drawing you out of her mouth slowly, making sure you were watching her as she sat up. The voice on the phone was apologetic but excited. You couldn't keep your eyes off your aunt as she smiled at you, devious, now slowly removing her tank top. She shifted her shoulders seductively. "No no, it's alright. What's going on?" you asked the caller, your cock throbbing. It was hard to concentrate on what your colleague was saying as you saw you aunt's jiggly tits again, and because this particular colleague tended to ramble when they were excited, but what they were telling you was important. You could tell from the tone. You gasped, which was perfectly in time with the caller's reveal for why they called and your aunt engulfing your cock again with her hungry mouth.

You had to close your eyes, the returning sensations and amazing news making you shudder. "Are you sure?" you asked through the phone. "We didn't think those experiments were going to really lead to anything." If this breakthrough was real then this could change things for people like your aunt in a big way. Your aunt was massaging your balls as she blew you and you couldn't block the receiver in time to hide your groan. Luckily the person on the other end interpreted your quickening breath as a sign you were getting just as excited as they were. "Human trials? Already?" you blurted, your genuine excitement over how rapidly this was developing almost overwhelming your other, more carnal exhilarating experience. "Uh huh," you nodded, as details were explained to you. Your eyes widened. "No ... that's... I think that can work. I can do it. Yes... yeah. I do have a patient I can work with on this... ahhnn... Mmhmm!" You looked down at your so called patient, wanting her to stop for a moment so that you could concentrate on this important scientific breakthrough. But your aunt's mouth was just too wonderful. Too wet and warm. She could feel you hardening and swelling and she moaned around her thickening mouthful.

"Yes. Okay. Tomorrow morning is fine. I'll text you the address and ... okay... uh huh..." you wanted the call to end now but your colleague just wouldn't shut up. You strained to stop from moaning or swearing as your aunt worked you to the edge. She was determined to get you off before you got off the phone. "No nothing's wrong..." you mumbled. "I'm just tired. It's late...yeah. Okay. Thanks for the call. Yes it is great news it is. Fuckin great. Yep. Oh god... what? Nothing... it's... aaAAAHHH!" You erupted into your aunt's mouth, the thick spurts coating her tongue and the backs of her teeth. She was giggling while you filled her, made to cough as your cum slid down her throat but she shuddered happily. You were wheezing, the caller sounded worried, your cock pulsing around your aunt's lips. "No I just... stubbed my toe just now... I was... pacing around and didn't watch where I was cumming... going... yep. Yes. It hurts..." you lied, teeth bared as your breathing started to even out. Your aunt kept nursing your cock for a few minutes, now only interested in enjoying the lingering tastes of you. It was a relief when your colleague finally decided they needed to go double check on some data and you were able to hang up. You made sure the call was ended before putting the phone back onto the coffee table.

"So what was all that about?" your aunt said curiously, sitting up and delicately wiping the edges of her mouth with a finger. You wanted to kiss her again but decided not too, your thoughts preoccupied from what your colleague had told you.

"There's been a major breakthrough in our cum addiction research," you said, keeping things succinct. Your aunt's eyes went wide, seeing how serious you looked.

"Did ... did you find a cure?" she asked. It was hard to tell if she was excited about that or feeling some other emotion. Addiction did tricky things to one's psyche.

"Not exactly," you told her. You saw her tight shoulders loosen. Again, it was hard to tell if they were sagging in disappointment or relaxing with relief. No, this wouldn't be a cure. "But it will help a lot of people."