(40M) sex with twin sister over many years

I was always into her, and finally it happened. The two of us don't get together as often anymore, (we're both married, but we succumb once in a while) but there were a bunch of years in there where we got down a LOT. She always had a huge sex drive, and I couldn't ever resist her.

Every time we fuck it's so magical. She's always been my favorite.