I can't find a .16 walkthrough in the walkthrough section, and every other walkthrough says the same thing, after the lotion scene the next day you should be able to masturbate in her bed, but I cant access her bed because it doesn't highlight, I get the text saying I should go to her room and smell her panties followed by lying down on the bed text but the bed isn't selectable.You have not done what triggers it yet.
Get the walkthrough and follow it.