Do you think Madame Red was ever able to love her husband, who loved her, or was she too stuck on Vincent? What do you think would have happened if her husband had actually survived the accident?
I’m sorry I answered this terribly late!
Short answer: yes and no. Depends.
Long answer:
I think Madam Red loved his husband but was never in love with him. The typical. She was unwilling to let the past go, and that came back to bite her when she lost everything. I’m of the belief that her issues were rooted in her entitlement, not only towards Vincent but at life in general.
Good husband, good family. And while it was sad to lose it all, the fact she went crazy when she lost it was because she wasn’t entirely comfortable in the first place. It has sense, she based her Self in what others think of her (she didn’t like her red hair or the colour red and became Madam Red because a dude told her she looked pretty, I mean), so when she loses the others, she loses herself.
I do believe her when she says she was happy, she probably was, most times, but her understanding of the world around her was fragile. I think she went through a lot and that is normal to have a breakdown, that’s why she is a tragic character. But how her trauma manifested show us that she never even tried to resolve her inner conflicts (she even explicitly says so), and while in a different world she wouldn’t kill prostitutes, she was always going to be melancholic about her life.
I’m unsure about the last question. Something tells me that she would’ve been able to hold it better, she would have had someone left to help her deal with her sister and brother-in-law’s death. But I can see the same arc for her developing at losing a child. I see her not talking with her husband, the marriage growing apart, and she finally snaps. It would’ve made for a good story!
Most probably she would’ve tried to hold it together because he was a good man. I think since her arc is heavily based in lost, lost love, lost family, then she wouldn’t have done what she did if she had someone left (remember that Ciel came back after she started killing. She literally had no one else -that we knew of-).