Aisha has 3 children- Hasan, Lina, Hasin. Asma is her younger sister. She has 4 children-Rafifah, Siam, Rabita, Sadia. Rabita and Hasin were born at the same time. Aisha and Asma were staying at their parents' house when Rabita and Hasin were children. Aisha mistakenly breast fed Rabita. Now, 13-14years later, Aisha's eldest son hasan, wants to marry Asma's eldest daughter Rafifah. They never shared a breast. Only Rabita and Hasin did. Is the marriage between Hasan and Rafifah allowed in Islam? Please, It would be very helpful if you could answer the question with valid contexts like Verses from Quran and Hadith.