Partners, living together, each with own DC, who are all past the age of needing any stay-at-home parent. Mine lives with us.
Our financial situation is radically different. I own my own house, where we both live, have assets of around 1million, while he has always rented before moving in with me, and has a few thousand in savings, which falls to zero sometimes. We both work full time, but I earn about eight times more than him. His work is highly skilled but freelance and dries up completely sometimes. Our attitude to money is also different. He spends on things I wouldn't, despite having much less. While I give money to official charities, he gives a significant amount away to support people less well off within his family and community (a far larger proportion of what he has available and sometimes more than he has available).
Our finances are separate and if we get married there will be a prenuptial agreement. He contributes £500 a month to bills, plus pays for small random things if he is the one buying them. Probably pays about a third of date night expenses. He pays for his own DC maintenance, all his own personal expenses and gifts, including for me, my daughter and my family, which he insists on. I pay the mortgage and all house improvement/maintenance expenses, so it is clear that it is my house. I pay all my and my DC expenses. I contribute roughly 95 percent to big stuff like buying new cars we both use, all major grocery shopping, all unexpected expenses etc.
He is a wonderful SD to my child, and loads of garden and house maintenance work, and he is an amazing, wonderful man, so I and my DD are hugely better off emotionally and practically having him in our lives.
Nevertheless, money is by far our most sensitive, vulnerable area as a couple. It is the one thing we don't talk about easily (as he has a lot of shame) and it is my only concern about making the move to get married. Not because I mind him not having money, but because I think he would become very unhappy if he felt like a 'kept man'... yet it's impossible, for now at least, for him truly to contribute 50/50.