Modern women or not?

Ok, help me to understand,
Many time, I saw on movies/tv series of such cases,
Woman with daughter, re-married to another man
Man molests the daughter,
Woman knows, but keep quiet,
Or, woman doesn’t know, daughter tells, woman doesn’t believe, thinking daughter’s lying, and choose to believe the man,
Worse still, man said, it’s the daughter who’s trying to seduce him, and woman believe…

Maybe I’m never the ‘woman’, that’s why, I never understand…
And I keep seeing this type of storyline in movies/series,
Why? Is that a common ‘problem’? and if that’s a common ‘problem’ why?
Some cases, it’s because woman’s not independent, ie. keep quiet,
But most of the cases, the woman’s a job, and most of the cases, woman chooses not to believe the daughter, but the so-called husband (the re-married one)
Why?
Even if woman doesn’t have a job, shouldn’t she be protecting the daughter? Her baby? (of course, baby’s grown up to be a pretty lady)

Last week’s “criminal minds” presented a similar case, except the remarry part,
Woman knew husband’s molesting his niece,
She chose not to expose the husband, BUT she’s trying to hurt the kid,
Why are there actually some women think that, by ‘protecting’ the husband like this, the husband will forever be with her?
I thought, there’re many women calling and yelling for equal right, to show that, they’re great, they’re good, and they can be better than man
Ironically, there’re still some women, so emotionally dependent to their so-called men!
Or, there’re some other reasons that I really really do not understand??