No. Generally speaking, you should not log on to your spouse’s social media accounts. One exception to that rule would be if you and your spouse shared social media accounts such as Facebook or Instagram, it may still be acceptable for you to use them.
However, if this is not the case, logging on may get you into trouble.
Even if you and your spouse knew each other’s passwords and often logged on to each other’s accounts, you are not entitled to continue doing so after your separation. If you are tempted to log on to your spouses account, ask yourself this question first: Am I logging on to “check in” on what they are doing and who they are doing it with?
If the answer is yes, your actions are not appropriate.