I think, after reading loads of threads here, if you have kids you need to get married
It depends on your situation. If you are the higher earner, own more property etc, marriage isn’t worth it.
Basically add everything up and divide it 50:50 as you would in a divorce. If you come out worse don’t get married.
Especially if your dh is divorced. Mine lost everything, his house, his savings, car, everything. I had my own house, pension, significant savings- all of which he is now entitled to half of should we divorce. My mistake, i listened to family pressure to get married.
Also think about wills. If dh inherits as usual, he can leave it all to anyone he likes. His ex might put in a claim for a share for her kids- if dh doesn’t leave a will it will be split between his kids. I’ve written my will so while dh has a life interest in the house, everything ultimately goes to my kids. If we hadn’t married my kids would automatically have inherited without all the risks of challenge and legal documents..