Heath receives a shock in an upcoming episode as he discovers that he is the father of Bianca's unborn child.
Bianca (Lisa Gormley) and husband Liam (Axle Whitehead) have been trying to keep the news under wraps, but the blonde's younger sister April (Rhiannon Fish) throws a spanner in the works by telling Heath the truth.
Ewing told TV Week: "April thinks it's right for her to release that sort of information, and it's obviously a bit of a shock to Heath's system.
"He's on a mission to get as much information as he can and talk to Bianca about it. Heath is pretty dirty at Bianca for not telling him."
Home and Away airs these scenes this week on Network Seven in Australia and next month on Channel 5 in the UK.
> Home and Away Bianca to get baby shock
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