Is the seclusion that took place between the spouses considered a return to the marital bond after divorce, even if the wife's intention was reconciliation and not the husband's intention?

You erred in slandering your husband and his wife, and this is wickedness, as is your refusal to admit your mistake.

Being alone with a revocably divorced wife during her 'iddah (definition) (waiting period) is not sufficient for the رجعة (resumption of the marriage) according to the majority of scholars. The wife's intention to return has no effect, because the رجعة occurs through intercourse, not through seclusion.