When Riley invites the main character to the beach, she offers an outer outfit and a bikini suit, but we only get the outer outfit in the wardrobe (inventory). The character is going all naked in the right side panel when we go to the beach with Riley.

When I open the html page in Twine, I find out in the block 'Sissy Riley' the command line when Riley has invited the character, where it is supposed to give the clothes : <span id="spaceAct"><<button [[Home Menu]]>><<pickup '$inventory' 'Slutty Outfit1'>><<pickup '$inventory' 'Bikini1'>><<set $Time to $Time + 2>><<set $Riley to 58>><</button>></span>

For some reason we don't receive the bikini, that appears to be located in 'images/clothes/custom_bras/bikini'

I have also noticed other swimsuits - as well as many other interesting clothes -  inside 'images/clothes/custom clothes' and inside 'images/clothes/unused_assets/onepieces/tits.pressed'

As I understand it, it means these clothes are not used in the game yet... maybe in the future ?