A son dying after spending the night sick in the father's bed
If the situation is as you have mentioned, you do not have to make
Kaffarah (expiation), as you did not commit any fault that caused his death.
Q 2: I had a girl later. One night, I woke up to breastfeed her. Then, I fell asleep. In the morning, I found the bed cover on her face and she was dead. Please advise concerning the situation mentioned above. May Allah protect you.
If the situation is as you have mentioned, you have to offer a Kaffarah, as you committed a fault that caused her death. The Kaffarah is emancipating a believing slave. If you cannot do so, you have to observe Sawm (fasting) for two consecutive months to perform Tawbah (repentance to Allah).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.