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The neighbour may bring a claim for breach of contract against you in court and seek for damages.
May I help further?
No, asking would not count as agreeing I am afraid.
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Yes, it would be and she may not go to court after all. Furthermore, damages are to put her in the position she would have been had the breach not occurred. It would be up to her to show what loss is being caused to her by the breach.
Yes, both of you need to give consent.
I await your positive rating please.