Unfettered access to her udders

"I'll show you."

You begin by straddling Harley's midsection. Your cock lies flat, naturally extending through the channel of her cleavage and beyond even in its diminished state.

"Oh - My boobs?" Calm and self-assured in the wake of her recent accomplishment, the girl rolls them inward to engulf you without any need for coaxing. She looks up at you expectantly, though, as if she hopes to receive some kind of feedback.

"Good."

Rather than moving your hips right away, you lower your hands to Harley's sublime knockers and begin to tease her. It only takes a grope and a half to get her back arching, the girl's eyelids fluttering each time your rough fingers make contact with the tender skin of her areolae.

"MMmh!~ T-Too much...!" she whines, but the messages her body is sending continue to egg you on. Before long she's writhing in cross-eyed ecstasy beneath you, unable to recover from your relentless tweaking of her nipples.

Somewhere in the course of your ministrations, though, you get a sudden urge to grind up on one of those fat, heaving titties; a more unconventional sex act that you'd never have tried with, say, a human girlfriend due to a fear of alienating her.

...Thankfully Harley is neither human, nor your girlfriend.

Your suddenly-stiff rod cleaves deep into the doughy mass of her left breast. The grinding of your hips smears the squishy dick-cushion across her chest - a sensation you don't really expect her to find pleasurable - yet you're surprised to hear her react with a whine of satisfaction. You elicit many more from her on this unconventional path to release, which you eventually achieve by nestling your cocktip into the abundant flesh of her left mound at the moment of climax.

An unfazed Harley watches with half-lidded eyes as you jizz into the pillowy flab of her funbag. The girl's penchant for breastplay is further confirmed when you slide your dick into the channel of her cleavage only for it to be instantly engulfed by her hastily-merged mounds.

"Don't stop~...!" she mewls, wrapping her arms tightly around them in an effort to keep her bust steady for you. You almost can't help but oblige, hips bucking frantically as your cock ravages the smooth, blubber-lined pocket of space that exists between her bloated tits.

The sound of her moaning is surpassed only by the thunderous clap of your inner thighs against the fleshy underside of her rack. Her breasts ripple and redden more noticeably with every thrust, pushed nearly to the point of **** by the ferocity of the titfuck... Yet your Love Doll's only reaction is to gaze up at you with parted lips, an expression of pure lust on her face.

"Gonna cum...!"

"Ready!"

Your balls rumble to life, churning a fat wad into the tight compartment of Harley's cleavage. Cum dribbles freely in the aftermath, but you aren't finished yet: the moment her arms relax (and your twitching member is left un-engulfed) your dick dispenses a thick ribbon of seed, the majority of which ends up dappling her chin and lips. She giggles, but you can tell that she's a little grossed out by the experience.

"Just clean it off. Use your tongue."

"Nnh...! It smells!"

"Tough." you reply, devoid of sympathy. "You'll just have to get used to it."

Harley scowls, but she does as you ask. Her pink tongue emerges to lap up the cum on her lips and, to an extent, her chin, despite her obvious lack of affinity for the taste. You look on with a patient smile on your face, pumping yourself to attention for the learning activity you'd just devised.

"So, you like it when I'm rough with your boobs, huh?"

She nods. A little more enthusiastically than you'd expected, even, though her shame about feeling such a thing still comes across strongly.

"That's good, since I plan to do a lot of it." you explain, kneeling in such a way that your balls dangle a mere inch or two from her face:

"...Now let me show you what I have planned for us the rest of the time."