How do spouses stay chaste during long separations?

Good morning…
I have an important issue to help me getting your advice.
I’m working abroad and living away of my wife for a period of 3 months for each travel. How may we live our natural marriage in a correct way? Is it permisable to have some intimate chats online with my wife. Is it a sin to have cybersex with my wife. If yes, what can we do to avoid it.
Thank you very much for your guidance and I appreciate getting your guidance.

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How do I remain chaste while traveling abroad?

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