“It will be seen how in place of the wealth and poverty of political economy come the rich human being and the rich human need. The rich human being is simultaneously the human being in need of a totality of human manifestations of life – the man in whom his own realisation exists as an inner necessity, as need. Not only wealth, but likewise the poverty of man – under the assumption of socialism – receives in equal measure a human and therefore social significance.
“Poverty is the passive bond which causes the human being to experience the need of the greatest wealth – the other human being.” http://www.marxists.org/archive/marx/works/1844/manuscripts/comm.htm
Her account of the care care infants and children need if they are to develop the "capabilities" constitutive of "riches" in this sense is significantly influenced by the "object relations" version of psychoanalysis, particularly as this is developed in the writings of Fairbairn and Winnicott (see Chap. 4 in Upheavals of Thought).
She is the source I suspect of the best aspects of Sen's own version of the approach.
Ted