Unspoken sex (if it's tmi please excuse me)

Kellie • Mother of three and currently ttc #4 due to health issues my chances are starting to shorten every day! Staying positive and wishing everyone lots of baby dust
SO and i have been together for almost 9 years (off and on) and six together.. Just recently we have been having the wildest sex ( surprised I'm not pregnant yet Lol) this has happened twice where I I gave his behind a good licking and he loved it! I mean his man hood gotten rock hard and he went to over drive and made love to me like... Wow! Sex is always like wow but when this takes place is amazing.. I was a little embarrassed cause we both didn't know how to speak on it but the next time on our wild night it happened again it felt as if it came natural... We have never had anal sex which I kinda like I've done in a past relationship.. What happens now? What does this mean? Has anyone else experience this with their SO and how did you guys talk about it.. Did it make things weird or it came natural?