So, this idea was suggested to me, and I thought, why not? This takes place during The Sea of Monsters, while Grover is being kept prisoner by Polyphemus. Hope you like it!
Grover was terrified. Was he actually wearing lipstick? Gross. It didn't even taste like actual strawberry...
Ever since Polyphemus had brought him to that dreadful island, believing Grover was a girl (for which he was highly offended, thank you very much) Grover hadn't ceased to shake. He found it really hard to force his hands to weave the silk, just to make the act real. He needed to be calm.
He soon found himself humming Barbie Girl to calm his nerves. By the time he realized this, he stopped immediately. He felt himself blushing, and wished with all his might that Percy couldn't feel his discomfort through their empathy link. It would be more than embarrassing to have Percy laughing his head off at Grover's awkwardness, and even more for Percy to come to his rescue while he was still dressed like a lady cyclops, or a lady satyr. Lady Satyr? Well, that was a first. Grover didn't want to be famous like that, like "Hey, dude! Have you read about that satyr wearing in a wedding dress? Haha, yeah, funny, right? That was me!"
Gods above, no. Grover thought of how he would love to have his dignity intact-or as intact as it could be- by the time he got back to Camp. That is, if he ever got back. He resumed his work, which he had forgotten while he was lost in his thoughts, and continued to weave his dress. Ugh. He still couldn't repress the shudders at the thought.
Please, dude, he thought, Polyphemus, don't come just yet...
As if on cue to his thoughts, a deep voice resounded through the cave, taking Grover out of his ramblings and making him jump a good few feet. "MY BEAUTIFUL LITTLE TREAT! HAVE YOU FINISHED YET?"
"Hmm... n-no sweetie!" Grover stammered in a high-pitched voice, which wasn't really hard to make, since he was really scared. After all, in a matter of hours or days, he would be either a cyclop's 'wife', or a satyr-shish-kebab. "The silk..." He racked his brain to come up with an excuse, while Polyphemus's steps came closer and closer. "It entangles very easily! I can't get it right at the first try, but I AM trying, huh... sweetheart!" He finished lamely, but Polyphemus bought it, his footsteps faltering and fading away once more as he said in what must have been a caring voice. "DON'T WORRY YOUR LITTLE MIND, PRETTY! JUST FINISH QUICKLY! SOON YOU'LL BE MY WIFE! YOU HAVE UNTIL NOON! MEANWHILE, I WILL GO CHASING FOR MORE SHEEP! HMM... DELICIOUS SHEEP..." His voice faded away, and Grover finally slumped back into his chair with a huff. So much for 'not worrying his little mind'...
He was scared.
All right, he was terrified... Okay?
In fact, when, hours later, Polyphemus discovered Grover unweaving frantically the dress, Grover was so scared that he wanted to cry. After that, when he realized that Polyphemus thought that 'his lady' was just a bad weaver, he wanted to laugh from relief...
But nothing could compare to the moment in which he perceived Percy's and Annabeth's smells and that he really lost it.
Percy would never say anything about it later on, but Grover would still remember with amusement and embarrassment Annabeth's shocked expression and Percy's flushed face when Grover filled his forehead and cheeks with grateful kisses.
The lipstick took a whole lot of time to fade.