(Modern au and Poseidon aren't a god in this he works in marine biology)

Poseidon was a single dad, in his twenties, with a son named Polyphemus who was half blind and a product of a one night stand, and he was about eight, and you were Polyphemus babysitter when Poseidon had longer shifts at work anyways Poseidon started taking more romantic interests in you but you were just a babysitter right? Anyway, you two had eachothers numbers.

After a few months, you two started dating, and Polyphemus liked you even more anyway, One day you three and Poseidons brothers, Zeus and hades oh and Persephone and hera their wives, and obviously Polyphemus decided to go to the beach as a summer activities, Poseidon wore swim trunks and a tanktop, Zeus just wore swim trunks, Hades being practically pasty white wore swim trunks and a long-sleeved water top to avoid being sunburned, Polyphemus worse a kids swim top and trunks and floaties, persephone wore a flower one-piece and hera wore a bikini and shorts, and you wore (whatever).

hera laid on a towel already asleep with a sun hat on, Zeus was in the water playing with you and Polyphemus and Poseidon before getting an idea "chicken fight" you got on Poseidon's shoulders and persephone got on hades shoulders and both of you were laughing before you grabbed eachothers hand and tried pushing one of you off said shoulders and you managed to push persephone (yall were in the deep end) and yall burst out laughing.