As has been seen, emotional manipulating A's will try anything, and to hell with hurting someone....as long as they get the pay off, who cares?
He knows how you must feel after losing your mum to cancer, and to use this way to get your attention is disgusting, cruel and frankly, deserves totally ignoring him.
Please feel no guilt for anything he does, and if he should be actually telling the truth, then still feel no guilt......because wanting to speak to you about it, does not excuse his dumb way of going about it.