Final answer:
The provided excerpts do not align with George Orwell's 1984, making it challenging to provide an accurate answer. In Orwell's novel, the real betrayal feared by Winston with Julia is the internal loss of loyalty and emotional connection, not just external acts or resistance against the Party's oppression.
Step-by-step explanation:
The question appears to be related to the novel 1984 by George Orwell and centers around the character Winston's perspective on what the real betrayal between him and Julia would be. However, the mixed excerpts provided do not seem to come from 1984, so we may be dealing with a misunderstanding.
In the actual text of 1984, the ultimate betrayal Winston fears would be the loss of their internal loyalty and love for each other, not simply their physical relationship or acts against the Party - it's the destruction of their mental allegiance and emotional bond that would signify true betrayal.
This concern is explored in the dark and oppressive world where Big Brother's surveillance and psychological manipulation techniques are pervasive, thus showing Winston's paranoia about the power of the Party to corrupt his most personal connections.