Her mind flooded with pleasure, she shifted in her seat, her body releasing a new liquid. After a few moments, her hand found his and guided it between her legs, up her skirt, and to her now moist panties. She knew she wasn't thinking straight, but nursing him always tended to open up her inhibitions a bit, and besides, no one was coming, she thought.
For his part, it never took much convincing for him to seek her pleasure, and it wasn't long before him rubbing her clit through her panties was causing her breathing to get heavy and little moans to escape. After a few moments, he slipped a finger past her panties and into her cunt causing her to gasp loudly and grip the armrest hard. She shifted in her seat as much as she could to give his hand better access without dislodging her breast from his mouth.
As he finished with her left breast, her moans were becoming louder while he slipped a second finger into her sex, fucking her with them. She pulled his mouth up to hers, kissing him hard to stifle the noises she was making. The taste of her milk on his lips only heightened her arousal, and as she kissed him with his fingers buried in her cunt, her hand made its way to his zipper, struggling to release his obviously hard cock.
He pulled back from her, much to her chagrin. She even whined as his fingers and tongue simultaneously exited her, but soon she realized his plan and worked her panties down to the floor as he shifted and freed his cock.
She wasted no time spinning around and straddling him. The tight spaces between the airline seats made it difficult to get his cock positioned just right, but soon she felt the head pushing against her lips, and he filled her quickly as their hips pushed towards each other. Instinctively, they knew there couldn't be much more time, and their bodies furiously assaulted each other. She gripped the back of his seat hard as his cock pressed into her again and again. His lips once again found their way to the bountiful breasts suspended before them and engulfed one, nibbling at it gently, licking up the dribble of milk that was released. Neither of them seemed to care about the noise of their bodies coming together as they fucked, but each tried to contain their moans as best they could.
Considering the circumstances, neither one could have resisted their orgasm for long, and after a few minutes of copulation, he thrust hard into her and released his seed, his fingers pressing hard into the flesh of her back as his cock filled her one last time. She came, then, too, the feeling of him emptying into her being the catalyst for her own orgasm.
They sat there, unmoving for a few more moments, riding out the waves of pleasure and gathering their wits before she slowly slid off of him, grabbed her bra and panties, and carefully moved to the bathroom, trying to keep too much cum from leaking onto the aisle while clutching her shirt closed. The smell of sex was strong as he gently hid his cock back into his pants just before the flight attendant walked past.