Sonya then pushes Lucas to tell Vanessa how he feels, but Lucas is reluctant to make a move due to Vanessa's developing relationship with headstrong doctor Rhys Lawson.
Lucas instead decides to prove his love by taking the drastic step of buying a house for the two of them to share.
"Lucas thinks if he can provide a home for their baby, Vanessa will have to move in with him," a show insider told the Daily Star.
"He's totally in love and wants them to be a family once the baby is born."
"However, Rhys is also going to show his commitment to Vanessa in the coming weeks, so Lucas will feel even more isolated," they added.
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"He turns to Sonya, who tries to get him to confess all - but he doesn't have the courage."