Because it has been bumped up.
I am an Orthodox Jew and yes, I do wear a wig (it has advantages, it saves you from bad hair days).
I dont see her being an Orthodox Jew. We wear skirts only, not slacks. And red (?) wigs happen, but usually only if the wearer has red natural hair. But they are rare. And she wore lots of red items, we customarily do not wear red clothing.
And no, we do not have "honor killings". Few families (but certainly not all) cut contact with a family member (usually its mutual) who chose to leave the fold, but then again, estrangement due to different lifestyles happens in all sorts of backgrounds, ethnicities and cultures, religious or atheist.
But we would never ever kill anyone who leaves observant life. Never ever. Just to make that clear. It never happened and will never happen.
And we are well allowed to divorce and remarry. It is done all the time without consequences (one partner not agreeing to the divorce is another story, but that only basically holds the divorce up and prevents remarriage but there are no "honor killings" or such. And it is really rare.).
Wigs in the 1960s were super common for fashion. Not only women of color wore them but also virtually every white woman. Big hair was all the rage and the easiest you could achieve it was by wearing a wig. There was even a Barbie doll that came with a set of different wigs, thats how common it was for sheer fashion purposes.
Nice word: Bostonian.

This is one of my favorites. Take faces of all kinds of women from one particular country and make one average face. That is wat the University of Glasgow in Scotland did. Just like the reproductions made for Jane Does, it's about a broad hunch where somebody - possibly- is coming from.
(Orthodox) Jewish married women are supposed to cover their hair of shave it. Covering could be done with a wig or a headscarf. Both seems a little over the top, even for the seventies. Maybe she wanted to be unrecognizable for family-members or others (or indeed it was just to concur the cold). In some communities it's not done to divorce or leave the family/husband, without getting yourself in danger for revenge actions/honor killing.