It is possible to negotiate terms of a separation (including custody, child support, alimony, and equitable distribution (property division)) while still living in the same house. This would have to be done out of court with the terms entered into a separation agreement. The physical separation would take place contemporaneously with the execution of the separation agreement.
If you and your wife cannot agree on separation terms prior to a physical separation, then one of you will have to move out and file in court.
You may be able to force a separation by filing a divorce from bed and board claim against your wife. You must have at least one fault ground to file for divorce from bed and board, and adultery is one type. For more information on this topic, check out our article What Happens in a Divorce from Bed and Board?
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