Who is Alec from the novel, Imagine Me Gone?

Alec is the youngest son of Margaret and John. Michael and Celia are his siblings. He is gay and Seth is his partner. While he does not suffer from mental illness like his brother and father, he does tend to worry about money, his mother and politics. He also works to control how people think of him and tends to to spend money on what he thinks he should have even though he cannot afford it.