Welp...pregnancy can bring an increase in libido, so nothing wrong with her feeling bold...and horny.
It's completely normal. Even intercourse is okay if it's a pregnancy with no other problems.
Tho, idk if last part applies to twins too.
I wonder, by tradition, if it's acceptable to have intercourse while pregnant...
I know it's okay to do it, when the woman is in her late term (iirc), but is there a common belief in China that prohibits it ?