Page 42: But Ayatullah Seestani says wudhu is not necessary after any wajib ghusl nor for mustahab ghusls that are mentioned in rule number 651 of his Risala.
Page 43: Step brother is not a Mahram.
Page 48: Definition of Ihtiyat e Mustahab:
When a Mujtahid gives a general ruling along with a recommended option related to that ruling. His recommendation is basically a precautionary measure. The Muqallid (follower) can act either way i.e. act according to the general ruling or the recommendation. The follower must follow at the least the general ruling. The follower cannot follow any other Mujtahid on this issue.