When sun swells in 5 billion years what makes Earth still able to be swallow up?

Now newer studies show earth would likely to be swallow up becasue of tidal interactions. But sun also loses 30% of mass which makes every planet's orbit except Mercury move further out, not only it lose mass also it loses gravity. But what does tidal interaction have anything to do with it? Or earth may be... show more Now newer studies show earth would likely to be swallow up becasue of tidal interactions. But sun also loses 30% of mass which makes every planet's orbit except Mercury move further out, not only it lose mass also it loses gravity. But what does tidal interaction have anything to do with it? Or earth may be swallow up because of magnetic field and solar wind?
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