"This is a bad idea"? Normally, yeah, but in Hentai I would just encourage you to go ahead and do it!
Nothing will progress and no sex will happen if you don't do anything, after all.
Great ending. So leaving the dildo in while pretending to sleep is their signal for sex, eh? I'd have figured they'd just go at it the moment they're together, but I guess this works too.
Needs some kind of disclaimer, like so: "Unless you know yourself to be either (a) psychic, or (b) a very lucky bastard, DO NOT assume that this to be the norm in so-called real-life; trying this in the absence of (a) and/or (b) will result in your getting slapped (literally), marginalized from society as some sort of deviant, arrested for (minimum) assault, labelled as a sex-offender, etc.
That Aside ..... "Well, Isn't That Cute, ... BUT IT'S RIGHT!"