Interrupting consecutive fasting for expiation because of sickness does not matter
Question

                I had intercourse during the day in Ramadan and I started to offer the expiatory fast. I fasted until I had completed 57 days, after which I became very ill and could not fast, so I did not fast for two days, after which I resumed until I had completed 60 days. Is that good enough?.
Praise be to Allah.
      You did well, praise be to Allah, and the interruption 
      because of illness does not matter, because illness is a legitimate shar’i 
      excuse, and interrupting the fast because of it does not affect anything. 
      Once you had completed three days after that, the fast was valid and you 
      had offered expiation, praise be to Allah. End quote. 

    Shaykh ‘Abd al-‘Azeez ibn Baaz (may Allah have mercy on him)