My aunt... I don't know what to think of her

So my aunt is 45 and hangs with people like 20 years younger than her so she was hanging with a friend of hers and the gf decided to bring a guy, so it was my ex....
Long story short my aunt doesn't know why we broke up, but she starts to tell him I am just a free spirit and I'm absolutely over him and that he will be awesome for her friend, that they should totally do a one night stand, then I saw her today on Xmas lunch and she tells me all of this... 
I used to live with this guy so I feel a warm regard for him, despite that he behaved like an asshole to me but I don't tell my family what's up in my life, some part of me is happy he has found someone else, but most part of me doesn't need details.
I feel so annoyed because I feel she is being so disloyal and gosh knows what else she told him about me, then encouraging him to go with her friend... Ugh should I not be pissed? 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors