“and as far as we know, nothing assur occurred here. “
And if the boy had simply asked her out, are you implying that would have been an ISSUR???? Maybe it would not have been religiously PC according to some people’s opinion, but it certainly is no aveira, and should not be thought of as such. What are we doing to our children’s happiness when we start viewing something innocent, pure, and for tachlis, as being forbidden solely because it did not go through a bona fide professional “yenta?”