The words underlined are an expression that means Bill chose to do something (or not to do something), and he has to accept responsibility for that choice.
[嗯！比爾自作自受啊！]
看看畫線的部分！若說「自己鋪的床自己躺」意思不夠清楚，那麼「自己挖得坑（陷阱）自己跳」「自己種的果（惡果）自己收」 (to reap the fruit of what one has sown; to suffer from one’s own actions) 應該夠明白了吧！