Anna tore away the wrapping paper and remembered to fake a smile as Aunt Wendy and Anna's uncle looked on in happy expectation.
"Oh wow!" She gushed, desperately trying to make her face echo their excited happiness, "Leggings! For the gym! Thanks you guys!"
"That's great! We thought that, what with your mother setting the example - I mean, talk about gains, I'm so jealous - and you already following in her footsteps... well, we thought it would be perfect!"
Anna smiles again to cover up the wince at 'following in her footsteps' - her mom, had moved up from 'built' to 'incredibly built' this year, but Anna had not even so much as lifted a weight.
And yet here she was, glowing with health, in baggy exercise sweats that hid everything apart from toned, strong-looking forearms.
Between her, her mom and her aunt, the front room looked like a fitness competition or bodybuilding show.
"Uh," began Anna's aunt carefully, and Anna's belly felt like it had fallen out of her ass when she saw the hopeful expression, "can you try them on? I just want to make sure I got the size right - you need to look good for the 'gram!"
Anna froze and smiled again. She wanted to punch something, but it was nice to enjoy a birthday with family. She didn't want to spoil the day.
"Ah-" she started, but stopped as her mother's gently commanding voice cut across hers.
"I'm sure they'll be fine," Anna's mom said, then changed the subject, "I've booked a special treat for Anna today - I was hoping we could grab some food and then Wendy could join me and Anna for the afternoon. Is that ok?"
Anna's uncle seemed quite receptive and Anna remembered it was a big game in the football calendar this year. She could almost see him making up a list of where to watch it and what to eat as Aunt Wendy chatted through the afternoon plan with Anna's mom.
/////
"Put them on."
Anna's mom stood by the door to Anna's room, her expression calm, her broad physique filling the doorway.
In the cramped clutter of the room Anna had grown up in, with old teen idol posters up on the wall, it seemed that her mom took up half the space.
"Mom! I'm a frickin' adult for-"
"Put them on," it was an order, as certain as day meets night.
Anna turned and looked at the cream coloured leggings, adorned with darts of pink at hip and ankle and large panels of stretchy mesh, as they lay small and shrivelled up on the bed.
She clenched her first and felt her forearms bulge as she thought about defying her mother, but she caught a tiny, almost imperceptible movement: her mom's eyes widening and nostrils flaring in pleasure at the suggestion of a challenge.
The Game had started.
Anna gulped and let her hands open up, raising them only high enough to desultorily hook her thumbs in the waistband of her sweats and pause.
Playing the Game was... weird. It was about limits. Weird limits. And the heart of the Game was Anna.
"You either have to cum before I get your sweatpants off," her mom said, "or you're not allowed to cum until you get those leggings on."
Anna gawped. There was no way, that was ridiculous.
Even as she hesitated, her mother took one huge step across the room and lunged forward, grabbing fistfuls of pant and underpants alike and yanking them down, leaving Anna naked from the waist down.
Exposing the reason the Game existed.
Anna had a cock. And not just any cock, but a huge, sense-defying monster that looked like it killed vaginas for fun. If that fucker had been green, the Hulk would have felt pretty awesome about having a monster cock like that swinging between his thighs.
As it was, the huge dong, finally freed from painful confinement, was happy drawing little lines of precum across the backs of Anna's calves. It was brutish, massive, veiny and grotesque... and amazing.
"One point to me," her mother growled, taking the huge meat in two strong hands and beginning to jack it roughly, "now, if you cum before you pull the leggings up, you're giving me a triple shot tonight... hmmm you're gonna give me sooo much juice!"
Anna moaned at the thought of what that would mean, how that could end up, and stooped quickly to grab at the leggings, trying to jam a foot into one of the leg holes before the inevitable happened.
/////
The first time Anna's mom had taken Anna's cock in her mouth, it had taken three hours of patient, deliberate stretching and lubrication. Now, it was fast enough to feel like an assault, as the telltale click of jaw muscle signalled the immense, fat, flared rim of Anna's cock passing her mom's molars and pressing down into a throat that looked like it could mangle anything foolhardy enough to enter it.
Instead, with a lunge of her head, Anna's mom seemed instead to swallow, snake-like, a lump that would put a full-sized fire extinguisher to shame. The corded muscles, tendons and squirming veins of Anna's mom's neck were bloated outwards on a tide of sinking cock-meat and darkened to a deep red-purple colour as Anna's quickly hardening cock was pushed, sucked and swallowed deeper and deeper.
Anna groaned as her mother's strong hands clamped down on her stiffening crotch-monster and physically crammed dick-meat into that straining, stretched out mouth, driving Anna's enormous glans down further and further and pulling Anna off-balance, thwarting Anna's efforts to get the stupid leggings on for a moment.
The feeling of warm, wet throat around Anna's cock was incredible, even more so when she felt the slit of her dickhead pushing at another orifice deep inside her mom... she was in her mom's mouth as far as any human could have possibly taken her.