Hello IsThere. I agree with you. I admire your stance on being a bit if a stickler, and for doing this before marriage.
My hubby and I are both on second marriages, and we each had baggage children already.
I agree with Magda that this is not a reflection on what your fiancé thinks of you!
So be gentle, but clear, respectful and kind and understanding and see if you both can come to an agreement. Talk to him about the bits you have read in here that supports your view.
My DH and I have agreed to omit the offspring from our wills. (Apart from some small items mentioned so that none of them then could fight over it (rings go to the girls for example). Not that we think they would fight).
It is worth mentioning to him that on marriage, previous wills are null and void. A spouse automatically is protected inherits if the other dies if there is no will.
For us, Like in a first marriage, we have chosen that the surviving spouse will inherit all, will have the wealth to enjoy or spend until they die. Then the whole lot is divvied up between the (joint) kids,with one from each set being executor.
I believe in marriage. Mine has been my second chance and we have worked hard at it and simply love being together. We are a support for one another.
There is a line in the marriage service, "all that I have I give to you" and you seem to believe that and hold the same principal as me - marriage of the two families resets the equations. And I agree with you Otherwise, perhaps continue dating and keep finances separate
If you have separate finances then you are always ready to leave, disconnect. If you treated your job or home this way, you wouldn't fully invest. I think the same is true of a marriage.
Look at this as a problem to negotiate successfully, and don't dig your heels in and be feisty and lose something which is precious to you here. Open up your true feelings about JOINING as one. There is probably stuff on moral/religious websites that could eloquently and kindly put this into words for you.
Bear in mind -Men often feel the need to provide. tell him, he is only 1/3 through his adult life with ten or twenty years more work before retirement. Allied to you his chances of good health and good wealth, and happiness are far greater - and all the children benefit from seeing your strong union.
Nothing stays the same. His exwife might outlive him. His children might marry rich or poor. But in his passing he might want to treat his family equally to each other, regardless of what they inherit elsewhere.
Post marriage, I believed anything else would be inequitable.
ps -and I have a friend who has 'won' the bigger share of inheritance for her children over his, but their marriage includes some separateness, where their loyalty and money is divided. They are in it for the now and are happy with that compromise, that they wouldn't do the downsides of sickness/health nor richer/poorer. I'm too much of a stickler to want that.