Mónica Vergara

The provided news articles do not contain any information about a person named Mónica Vergara. Therefore, it is impossible to provide a summary about her based on the given context. The articles discuss unrelated topics: one concerns the legal investigation of Marc Iván Ostarcevic, the son of Norma Duval, in relation to the business dealings of Matthias Kühn, and the other reports on changes occurring at Isabel Pantoja's estate, Cantora, following its sale. Without any mention of Mónica Vergara, it's impossible to determine her background, newsworthiness, recent events related to her, or her current relevance.