STANLEY [bellowing] Hey there! Stella, Baby! (1.1)
The first thing the audience sees in Streetcar is the dynamic between Stanley and Stella – not the relationship between the two sisters or the sexual tension between Stanley and Blanche. This marriage and its foundations are at the core of the play’s conflicts.
STELLA Can I come watch? (1.8)
Mitch will later tell Blanche that Stella and Stanley are just crazy about each other, but we get a sense of this mutual adoration early on in the play. Stella dotes on her husband to the point of worship.
STELLA Yes. A different species. BLANCHE In what way; what’s he like? STELLA Oh, you can’t describe someone you’re in love with! (1.146-8)
Love blinds Stella to the social differences between herself and her husband. She doesn’t see the compatibility issues that Blanche does.