There is some Ksenya content after this. After meeting her at her store you can rarely find her in front of the city mall during the day with her mom (only one time). After that event you can see here rarely during the day at the lake during clear weather (with her mom taking progressively more risque photos of her), and then after that you have the option to become her girlfriend at her shop (contains a kissing scene). That is the current end of the quest as far as I am aware, and there is no more exhibitionist content with both Sveta and her at this time.Possible SPOILER
Sorry if this question has been asked before but I can not find what time/day the trigger is. When it comes to ksenya what time/days does she show up at the park? AFTER you have already taken her picture and vise versa and know about her store.