Hazrat, as you know my wife is not able to fast because we recently had a new baby.
Alhamdulillah, she tried her best to get Tahajud in, but there are times when she misses it because of the timetable I follow, where the sehri end time is 1:30am. The reason for this is because she is making my sehri breakfast if you want. In such a situation, is it permissible, if she can follow another Hanafi timetable where the start time for Fajar is about an a hour, or so ahead (2:45am) approx, so she can get Tahajud in.
Or, is it the same principle with fast, where one can only follow one timetable for sehri, and Fajar?
الجواب وبالله التوفيق
If due to being busy with household work, she is unable to offer tahajjud salah during its actual time, then she should offer it right after she completes isha salah, taraveeh and witr.
واللہ اعلم بالصواب