Mi madre hace cosas extrañas

As you know my mother is a 39-year-old milf who wears huge and boring pants to sexy lingerie, I had to see her on occasions using thongs at home and having them show through her pants or pantyhose. Other times I saw her in pure thong when she was changing or making a mistake comes a day that I saw her leaving the bathroom towards her room quickly wearing only a Calvin Klein thong but with the most unusual part, it was being used as if it were between her buttocks and the front part on her butt, it was very rare and exciting. What woman uses a thong like that? And it wasn't even the last time she did it when I arrived home from an outing, she didn't notice I had arrived but was sitting in a living room chair with a pink thong on, just like the one I saw her wearing earlier, and as soon as she saw me arrive, she greeted me apologetically and rushed to get a pair of pants. I'm sure I saw her well on both occasions and she was wearing thongs backwards, why? So that I could see her? I doubt it very much in neither of the two situations she was completely sure I would see her, is it more comfortable for her or more exciting? She's not naive, knowing how to use thongs but in those occasions why does she wear them like that??? What do you think?