Showed off for friend(s), mistake?

My partner had guest over, and they were chatting in the living room while I was doing some housework in leggings and a pink thong, which was clearly visible through the fabric. I noticed them both stealing glances at me, so I decided to have a little fun by bending over and giving them a good view.

At one point, my partner mentioned, "You do realize those leggings are kinda see-through, right?" I blushed and replied, "How would I know? I’m not the one staring!"

After a little more playful teasing, his friend joked, "You might as well show us your ass since we can see it already." I laughed and said, "Maybe after I finish some more work." But eventually, to amuse them both, I pulled my leggings down just enough to reveal my ass in my pink thong.
Did I cross a line ?