Must the mother make up the days her deceased husband missed in Ramadan if she is not certain whether he made them up, and should the make-up be day-for-day or more?

If parents break their fast in Ramadan (definition) without a valid excuse, they must repent and make up for the missed days. If the breaking of the fast was due to sexual intercourse, then the expiation for intercourse (emancipating a slave, or if unable, fasting for two consecutive months, or if unable, feeding sixty poor people) becomes obligatory upon them, unless the wife was coerced, in which case there is no expiation upon her. The expiation is not repeated by repeated intercourse on the same day, unless one engages in intercourse, then offers expiation, and then engages in intercourse again. If the father dies without making up his days, it is permissible for one of his sons to fast on his behalf. If he engaged in intercourse and did not offer expiation, the expiation is paid from his estate, and it is permissible to fast on his behalf instead of feeding the poor. The preponderant opinion is that the guardian fasts on behalf of the deceased in these cases.