I Was Caught In A Thong

I went to my gym few nights ago after work it was little later in the evening so i thought there wasnt alot or any body there. I decided to wear some basketball shorts and a tshirt and a black thong and bra. So as i arrived no one was there so i started to use the machines after like 30 minutes a lady walked in and started to work out as well i really didnt think anything of it. After a little while i went to thr bike machine and started to ride it. I noticed the lady walked behind me then came and dat on thr onr next to me i didnt think anything of it after a few she introduced herself i did thr same she started to make a little small talk after o probally about 10 minutes shr said im sorry but i couldnt helo but notice your thong i reached back behind mr and relized it was about 2 in. Above my shorts i went to pull my shorts up and she said no no its fine you just dont see alot of whale tails anymore i kinda miss it as she smiled at me. She then proceeded to ask if i was trans or what i was so i told her. She said to me hunny then you are you wearing shorts and a tshirt why not like workout leggings booty shorts and a top or something like that. I told her cause people more or less alot dont really care for get alot of shit for it she said no one is here but me and i support it ill do you one better ill change and were what you wear. I told her i didnt bring anything but this so i cant she said i can help with that as she went to her car she back in and handed me a pair or booty shorts and a small top she said dont worry i just bought those lets go so i went with her and i went in a stall and changed and so did she she looked at me and said how do you like it i said i love them she turned and see im supported my whale tail also you ready? I said yes we walked out snd did our stuff after it all she said we should hang out and gave me her number and we did but thatd another story