Second marriages are more common than the conversation around them suggests, and the people in them are frequently treated as though they are asking for something.
They are not. But some things are genuinely different, and pretending otherwise helps nobody.
Say it at the start
Not in the first sentence, but early, plainly, and from you rather than from someone else.
Almost everyone handles this well when told directly. Almost nobody handles it well when they find out later from a relative. The damage is never about the fact — it is about having been managed.
You do not owe anyone the details
"It ended some years ago" is a complete answer to a stranger. A person you are seriously considering deserves more than that, in time. A family you have met twice does not.
The order matters: acknowledge early, explain later, and only to the person it concerns.
If there are children
This is the part that needs real conversation rather than reassurance.
- Where do they live, and where will they live?
- What does the other parent's involvement look like?
- What is the new partner's role meant to be — and what is it not?
- Have the children been told anything, and what?
Vague optimism here causes enormous pain later. Children are not a detail to be sorted out after the wedding.
What you should expect from the other side
Questions, which are fair. Curiosity, which is human. A degree of caution, which is reasonable.
What is not reasonable is being treated as damaged goods, or being told you should lower your expectations. Anyone who says a version of that has told you something about themselves, and you should believe it.
What is different, honestly
You will be more careful, which is an advantage. You will know what you cannot live with, which is a considerable advantage. You may also be warier than the situation deserves, which is worth watching for.
The people who do best second time round are the ones who neither hide the first marriage nor let it become the main subject.
A first marriage that ended is a thing that happened to you. It is not a description of you, and anyone who treats it as one has saved you some time.