Okay, maybe I’m not understanding the word sharai parda, but I thought it meant you did hijab?!
Anyhow, obviously when you adopt a child you do it with the intention of “making” that child yours, why would you else do it? One thing is how you feel about the child in your heart, another thing is what your relationship is with the child in your religion, in this case being Islam. And as I can see it from the replies here I guess it all come downs to how you view upon this. For me personally I would do something like TLK suggested as even if I dont do sharai parda/Hijab, I dont have the frank kind of relationship with na-mehrams in my life (cousins, door ke rishtedaar etc etc), which I would like to have with a son.