A: I wish you would not be so selfish.

我希望你不要那么自私。

B: Selfishness is one human being‘s instincts. It is very difficult to get it outroot and branch.

自私是人类的本性之一，想连根拔除是非常难的。

A: But you should at least consider your future.

但你至少应该考虑你儿子的未来。

B: His mother, not me, should do this.

是她妈妈应该这么做，不是我。