In a multiple case study research, participants are couples and interviewed individually. Husbands and wives together treated as a unit of analysis. Could you suggest any simple data analysis or within and across case analysis compulsory?
Estudo de Caso Múltiplo Integrado conforme Yin (2015), pela unidade de análise que une essa possibilidade de estudo. Uma sugestão de metodologia de análise que pode ser utilizada neste caso é Análise Textual Discursiva, com referencial em Moraes e Galiazzi(2007).
With a small sample, I recommend comparative case studies, which you could do with either content analysis or thematic analysis. The main difference between those two approaches is that content analysis relies on the systematic application of a predetermined codebook, while thematic analysis develops the codes from the data itself.