what are the dildos for?
If you found them in Olivia's room, they belong to her. The dildo in the in-game online shop belongs to Emily.
I don’t see any dildos in the shop
In the latest version of the game, Emily spends several nights watching porn with the MC. During one of those nights, she asks him to buy a dildo for her. After the conversation, a regular-sized, blue dildo will appear in the shop.