Sylvain Aubert is chief executive of Brisa SA and a member of its key management personnel. The shares of Nautis, a supplier of Brisa, are registered in the name of his sister-in-law; in practice, Sylvain gives Nautis its management instructions and signs its contracts. Write a note determining whether Nautis should be examined as a possible related party of Brisa, separating case facts, rule and judgement.