Victor seeming to have Rosita handled for the time being, Aiko releases her grip and sits in the sand beside her twin sister. Both of them are in the thick of an intense sexual rush from what they've just done to the poor woman.
Aikoko closes her eyes and starts to lose herself in ecstasy. Aiko reaches across her shoulders and pulls Aikoko's dress off over her head. Aikoko doesn't resist other than to squirm and fight to keep at least one hand at work on her crotch whenever possible, only letting it go unattended for a single second while Aiko pulls the dress free of her arms.
When the dress comes free after barely three seconds, Aikoko's body is revealed in full naked glory, Aikoko (in fact both sisters) having neglected to bother putting on a swimsuit underneath. She scarcely takes notice though.