Go to the foodcourt

You check the time, where you see it's 12:30, prime time for people to have lunch. Not just that, but families to have lunch. You head to the foodcourt, where you're greeted by long lines and the smell of grease. You scan the tables, looking out for any dads. You saw a few men who were mall workers sitting alone, likely dads. Most children were seated with mums. Most of the dads you saw were really attractive either. Finally, you spotted a man, early 40's perhaps, sitting with his teenage daughter. Bingo. You approached them, spotting that the girl was on her phone, occasionally grabbing a fry, while your DILF was munching on a burger.

"Excuse me?" You interrupt, the father-daughter duo looking up, "I noticed you were eating a burger there?"

"Yeah?" He said, some arrogance evident in his voice, "What's it to you?"

"I just think you need another ingredient." You say.

"What?" He asks, eyebrows furrowing in suspicion.

"Why don't you stand up and drop your shorts."

"No way man!" He yells quickly.

"C'mon!" You say, "You'll love it!"

The man stands, and lowers his shorts, letting his fat, flaccid cock drop out and hanging balls.

"I'll just stimulate them a bit." You tell him, dropping to your knees.

You envelop his cock in your mouth, easily taking it all and nestling your face in his pubes. Using your skilful tongue, his cock rises, hardening in your mouth. You can feel it getting harder, making you work to keep it all in your warm mouth. When you feel it stop growing, you pull off, his impressive dong flopping out.

"Nice piece…" you compliment, waiting for a name.

"Greg." He answers, grabbing his cock to slap your face with a bit.

You nod, returning to his meat. Greg sighs, throwing his head back. You begin bobbing on his cock, sucking him good. Running your tongue from the root to the slit in back, tracing his veins, you make sure your tongue has covered every inch of his dick. You begin fondling his hairy balls, moving them around in your hand. This excites Greg a lot, and you can feel them begin to tighten.

"Alright Greg," you say, pulling off, "here's the secret ingredient!"

You begin jerking his baby maker, aiming it at the burger, before he erupts with a loud moan. He shoots several wads of thick cum into his half eaten burger, adding a different type of mayo. When he was finished, he collapsed into his chair, some cum dropping onto the seat. You give him his upgraded burger, and he takes a bite.

"Good, aye?" You wink.

"Hmm…" he sighs, unsure.

With a bit of convincing, Greg finally agrees that he enjoyed the improved burger. You smile, before deciding how he can get your 'secret ingredient'.