My (F27) thick and busty cousin wore a tight white dress and everyone could see her erect nipples pokies at her birthday party

I attended my 27 year old cousin's birthday party today and it was a huge party. I was surprised when I saw her as she had a really tight white dress and I'm sure everyone could see her nipples poking through the dress. It was so obvious especial under the cold air from the air cond. I wasn't able to take pics as there was too much happening in the party plus it was kinda dark but luckily she posted it on her insta. Seeing her pokies made me hard considering she had really huge tits but I'm not sure what her size is as I'm bad at guessing.

At one part of the party, I saw her friends pointing at her pokies as it was really visible and erect. One of them even giggled and poked her nipple as another girl pinched it. I saw my cousin gasping and gritting her teeth and squirming.

I also think she didn't wear any panties as there was no panty line from that tight dress. Her group of friends were laughing as her visible pokies and I knew she was embarrassed.

I have pics of what she wore too