G.R. No. L-12900 - Siman vs. Leus

Gina P. Tecag and Marjune B. Manaoat cohabited as husband and wife for two years before formally solemnizing their marriage on August 2, 2006, at La Trinidad, Benguet.
Their union began with mutual endeavors in vegetable farming and later adjustments when Gina secured employment in Macau, even facilitating job opportunities for Marjune.

Communication between the spouses gradually diminished, with infrequent and tension-filled telephone calls—often marked by arguments and instances when Marjune was too drunk to meaningfully communicate.
Gina received information and later confirmations that Marjune was involved in extramarital affairs, a development that significantly strained their relationship.

In response to the marital breakdown, Gina filed a petition on October 9, 2012, to declare their marriage null and void on the ground of Marjune’s psychological incapacity.
The petition was bolstered by evidence appearing to demonstrate that both parties were affected by personality disorders:

Professor Emma Astudillo-Sanchez conducted a psychological examination through interviews with Gina, her sister Sofia, and her brother-in-law Christian Tabadero.
The resulting Case Analysis Report diagnosed Gina with “Anxious and Fearful Personality Disorder” with elements of “Dependent Personality Disorder.”
Although not directly examined, Marjune’s behavior was characterized by Prof. Sanchez as indicative of an “Avoidant Personality Disorder.”

The expert report argued that the personality disorders—developed from early life experiences—manifested sufficiently during marriage to preclude the proper performance of essential marital obligations.

The Regional Trial Court (RTC) of Abatan, Buguias, Benguet, Branch 64, granted the petition by declaring the marriage null and void ab initio in its Decision dated January 20, 2014.
A motion for reconsideration filed by the Republic through the Office of the Solicitor General was denied, as reflected in the RTC Resolution dated July 10, 2014.
The Court of Appeals (CA) affirmed the RTC’s ruling in its Decision dated June 29, 2016, relying heavily on the findings of the expert report, and subsequently denied the Republic’s motion for reconsideration in a Resolution dated January 13, 2017.
The case eventually reached this Court on a petition for review on certiorari challenging the CA’s decision.

Whether the Court of Appeals erred in upholding the nullity of the marriage on the ground of psychological incapacity.

Determining if the expert report sufficiently proved that the alleged psychological conditions met the thresholds of gravity, juridical antecedence, and incurability.
Evaluating whether the evidence presented established a clear and causal link between the alleged personality disorders and the inability to perform essential marital obligations.