Classification of zina in difficult situations (here: for a disabled person)

As salamualaikum May i ask once again a (maybe two in one) question on behalf of my dear sister's name. A long time ago she agreed that if i think she intended to marry, i should arrange it or at least she should have my permission to meet a man (cause of her severe physical disability, i try to help and protect her as best as possible for her own good). ((Again: Its her free will and decision as she came to islam to live it as scrupulously as possible.)) Yesterday she told me that she is in a affair, has comitted zina by speaking and looking at a young man as she was out only for anhour to breath fresh air and soak the sun as she hardly goes out of the place where she stays under our care. I wanted to do a research before taking any decision. What i know is: > "The woman and the man guilty of fornication/adultery,- flog each of them with a hundred stripes: Let not compassion move you in their case, in a matter prescribed by Allah, if ye believe in Allah and the Last Day: and let a party of the Believers witness their punishment." > — Qur'an, Sura 24 (An-Nur), ayat 2 what i found: > It was narrated from Abu Hurayrah that the Prophet (peace and blessings of Allaah be upon him) said: “Allaah has decreed for every son of Adam his share of zina, which he will inevitably commit. The zina of the eyes is looking, the zina of the tongue is speaking, one may wish and desire, and the private parts confirm that or deny it.” "Nor come nigh to fornication/adultery: for it is a shameful (deed) and an evil, opening the road (to other evils)." Is her action leading to a specific hadd, if yes, is there a Special rule for disabled offenders? Who would be responsible to carry out the hadd in this case? I hope that i asked my question correctly and I am great ful for any response, criticism and correction.