Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

 

Allah is All-Merciful and Compassionate; He has promised to answer the prayer of the distressed.

So, I would recommend the following du’as:

1- First, read hamd and salah on the Prophet and read Fathihah and Ayat al-kursi.

2- Then recite the following du’as:

Laa ilaaha illaa antha subhmaanaka inne kunthu mina al-zzalimeen

(There is no god but You; glory be to You; verily, I am one of those who have wronged against their souls).

Yaa hayyu yaa qayyoomu bi rahmathika astaghithu

(O the Ever-Living One, and the Source of all beings, I seek Your help and assistance in regards to my condition; so help me out).

Laa illaaha illa Allaahu al-azheem al-haleem, laa ilaah illa Allah rabbu al-arsho al-azheem

(There is no god but Allah, the Great, and the Clement; there is no god but Allah, the Lord of the mighty throne)

Allaahumma laa sahla illaa maa ja’althahu sahlan wa antha taj’alu al-hazana idhaa shi’ta sahlan

(O Allah, there is nothing easy unless You make it easy; so make this task easy for me)

Allaahumma inee a’odhu bika mimmaa ajidhu wa uhaadhiru

(O Allah, I seek refuge and protection with You from the pain and affliction I am facing now; so help me out).
So, I would urge your sister to be consistent in the practice of dhikr and du’a. Allah will make it easy for her. I pray to Allah to grant her a comfortable and smooth delivery and bless her and her child.

 

Almighty Allah knows best.