Two cents,
It may not be any reason related to your mom, it is just the VO. Similar to
a failed job interview, we try to guess what went wrong. But the fact
could be nothing really went wrong, but the hiring manager just want to
offer the other candidate the job for whatever reason - they know each other
before, they graduate from same school - you name it. My wife and I have
seen these many times after we started working.
The visa interview is worse - you even don't someone to compete with. When
you have prepared all you can, there only leaves the opinion of VO - which
we have little control over.
Pat pat. Or if you are a respectful fighter, start a movement to change the
law and get ride of immigration assumption in the 214(b).