1: Your former partner has no rights, because you were married under a prenuptial agreement

Your former partner has a right to part of the retirement pension that you accrued during the marriage. It is possible to make different agreements in the divorce settlement. If you do not agree otherwise, your former partner will be entitled to half of this amount when you retire. It makes no difference whether you were married in community of property or with a prenuptial agreement, unless your former partner's relinquishment of this right is laid down in the prenuptial agreement.

In the event of divorce your former partner will be entitled to partner's pension (or: special partner's pension). Here too, it makes no difference whether you were married in community of property or with a prenuptial agreement. Your former partner can however relinquish special partner's pension. That is an option.