Surprise in my stepdaughters laundry

I spent most of my day cleaning and catching up on chores. Naturally, I wash as I'm cleaning to optimize time. Not to waste water on the load, I asked my stepdaughter (23) if she had anything she would like to add to make a full load. I think I woke her from a nap because I barely made out what she said. I walked away to grab a few more items of clothing from my room. When I returned she was adding her clothes. Separating them from her hamper and dumping them into the washer.

I come back later in the day to fold the clothes. Thinking nothing of it I noticed she included a pair of her panties. I keep folding and notice another pair and another. This isn't the shocker, I wash clothes for her occasionally and come across a pair or two. But not in this volume. She also happened to include a pair of crotchless panties to my surprise. I didn't know what to think. Even as I type this my heart is racing.

I didn't take her as the adventurous type and surprised she included them in the wash. I'm sure I'm overthinking it but I definitely got a rise.