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I like her too. Sarah and her son were great in Neighbours.

Because it's cheaper I expect.

Does sound like something serious for Sarah.

I think the story must have changed to them sleeping together to make the future more interesting. Nothing like that was seen or hinted at in the past though.

I was watching Neighbours then, but never got the impression there was an affair between Karl and Sarah. It seemed more of an emotional connection to me, although they did kiss once or twice.
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I thought her son was called Angus, and definitely not Karl's.

Yes!!! Great news. :)