1. What are rulings of Khums? Suppose I have 100 rupees in saving so should I pay 5 rupees Khums according to 5% or 20 rupees according to 5th part. 2. If during prayer I forgot is it third rakat or fourth? Then what are rulings for completion of prayer. 3. What are legal obligations of oral sex with wife. What is allowed in oral sex with wife and what is not allowed? 4. My friend loves a widow. The widow has two daughters. The widow is not ready to marry but she is ready for Nikah Muttah. My friend wants to know either we can recite the Nikah Segha byself without any Molana and evidence. Means without Gawah. Is it allowed or not?

Answer of your questions. 1= Khums means 1/5 of total. so khums on 100 rupees will be 20. 2= You will consider that you are in fourth rakat and complete the namaz. At the end of namaz you will offer one rakat namaz e ehtyaat. 3= میاں بیوی ہر طرح سے ایک دوسرے کے لیے محرم ہیں اور وہ ایک دوسرے سے ہر طرح کی لذت اٹھا سکتے ہیں، اس کے لیے دونوں کا راضی ہونا ضروری ہے۔ 4= If they both are eligible to recite seegha nikaah ( they have all conditions and abilities which are necessary for a nikaah reciter) they can recite their own nikaah. evidence is mustahab while reciting a nikaah. So without gawaah , also nikaah is permissible.