Does delaying the giving of expiation make everything bought before it is given unlawful?

Delaying the disbursement of expiation does not prohibit a woman from purchasing what she desires. The question remains whether she incurs sin by delaying the expiation. This depends on whether the expiation is due immediately or can be delayed. The more apparent view is that expiation is obligatory immediately if its owner has transgressed and disobeyed, but it can be delayed if there is a valid excuse.