It just happened.
I think I just seriously compromised the relationship between my mom and my aunt (her sister).
Let me explain, my aunt (who already has 3 children from different fathers) just posted on facebook that she is pregnant with twins.
I'm usually a thoughtful person, but this time I couldn't resist and commented:
"Congratulations, finally two children from the same father".
When I regretted it and was about to delete the message, she had already blocked me.
I don't think there's a solution to this situation but if there's any development I'll update.
TL;DR My aunt posted on Facebook she is pregnant with twins, I was too honest in a comment and she blocked me.
Note: sorry if the translation was not the best. The original text was in writing in portuguese of Portugal.