Family well-being in vulnerable livelihood contexts is shaped not only by economic conditions but also by internal and relational family processes. This study examines the effects of resilience investment, social support, and mother–child emotional relationship quality on the subjective well-being of fishing and farming families. A cross-sectional survey of 200 wives was conducted using purposive sampling, and data were analyzed using SEM-PLS. The results show that resilience investment, social support, and emotional relationship quality have significant direct effects on subjective well-being, with resilience investment emerging as the strongest predictor. Social support also significantly contributes to the quality of mother–child emotional relationships. Furthermore, emotional relationship quality partially mediates the effect of social support on subjective well-being, indicating the importance of relational mechanisms within the family. The model demonstrates moderate explanatory power in predicting subjective well-being. These findings highlight resilience investment as a proactive family process and position emotional relationship quality as a key mechanism linking social support to family well-being.
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