So assuming responsibilities in her place; interrupting her; and correcting her for something that men pretend to know better than women are OTRT...
Yes, but notice the capital YES in the prior set of answersDid the HAM perform a task to help her? Is weight relevant (taking something heavy...)? For instance bringing something heavy to the boss in her place? Are relationships with superiors relevant? With customers?
No to all Is it something common to all works?
It's something that could be done in any job To all works in which a certain task needs to be performed? Office works? Open air works? Mainly blue collar works? Pink collar? White collar?
What do men pretend to know better than women
This is VERY close! carry weights (is it correct?) ? Mechanics? Electronics?
Irrel Wohld C have adopted the same behavior were he in the HAM's shoes?
No Is the behavior recursive? Did it happen only once?
Multiple times Is doing something without the permission to do it relevant? Stay longer at the office? Keep something on his half of the desk (e.g. they had a TV or a stereo in the office and the HAM had the remote controller always in his half of the desk, which she interpreted as somethibg like "males have better tastes than women"?)
I'm going to clear out the clutter because you're actually very close to having solved this:
Maya incorrectly described her coworker's behavior as "mansplaining," which it wasn't. The coworker's exact behavior is irrelevant.