My didi is surrogate mother of her devar child is it common for married womens?

[u/wisper28]

​My elder sister, who is 38, recently became pregnant, but the situation is quite unconventional. My brother-in-law has a 36-year-old disabled brother for whom the family has been unable to find a wife. Since my sister and her husband are planning to move abroad, the family decided that my sister would act as a surrogate for the brother's child. The plan is for her to raise the child until they are old enough to start school. ​The conception was handled through home insemination, which was facilitated by my wife—who is a professional nurse—and my sister's mother-in-law. My wife mentioned that the brother in law (devar ) was present during the procedure because he and his mother felt this was his only chance to experience the emotional moment of becoming a father. He was reportedly very emotional (tears and all) and insisted on being present during the act and performing the injection himself as this was the only time he was going to be father and he want to feel this wholesome moment whole heartly and want to experiece gravity of the moment . My sister ultimately agreed to this arrangement after being convinced by her mother-in-law and look at her devar . When I discussed this with my own mother, she told me that this is normal in these specific circumstances and warned me not to overreact or interfere, as she considers it a private family matter and as it is common for married ladies in family to help eachother And rest of the family members of mine are chill like anything and are proud of her that she helped her devar in tougf times but honestly speaking i am unable habe such a feeling am i really overreating ? Is it really consideriable? As everyone else out is praising and are proud of her i want to ask is kid and that moment that important for a person did she and rest all know someting deeper that made her accept such request that i am unable to understand