Is it permissible to fast for two consecutive months as an expiation for abortion, even if this fasting period is interrupted by days of menstruation and Ramadan? And is the husband also obligated to fast?

If a mother aborts her fetus with her husband's consent, both are sinful and must repent, regret, and seek forgiveness. They are not liable for blood money (Diyya) or expiation (Kaffara) unless the husband directly caused or initiated the abortion.

If a woman is obligated to fast for two consecutive months and then menstruates, menstruation does not interrupt the continuity. The same applies to breaking the fast on Eid days and fasting during Ramadan (definition).