I respectfully suggest that you weigh your options before you do anything. Lying may be the easiest way out but I am
convinced that it is not the right choice. I’ve gone through both ignoring being found out, and talking with my mother
about this issue, and there doesn’t seem to be much difference between the two. If your parents do not want to talk
about it now they will most likely not want to discuss it later.
Giving some story about why they were in your room is delusion. Unless your parents are idiots I doubt the will believe
what you tell them, there are too many variables at play.
The best advice may be to let sleeping dogs lie. They have hit upon something that they cannot comprehend, and most
likely do not want to. They will most likely keep from bringing it up to you, and will let it lapse into the obscurity of distant
memory in short order to protect their image of the little girl they know, rather that face the psychological stress of getting
to know parts of your life that they don’t want to, and arguably have no right to given your age.