Is IMVU alright for married people, is a tricky and often difficult question. It’s not correct to say that every married person on imvu is cheating, but it’s also not correct to say that it’s never cheating. There are two factors you have to use to determine the appropriateness of a situation. The first is the precautions taken to limit things. Never crossing the line between IMVU and RL won’t seem like much of a big deal to single people but is critical for anyone married. You can take it a step further and not maintain any ongoing relationships with your spouse’s sex. It’s also important not to do things that reduce your desire for your spouse. If it’s adversely affecting the relationship, it’s definitely crossing the line.
The second part of the equation is how your spouse not only is affected, but will they look at it. How will your rl partner feel if they walk in at the wrong moment? Will they understand the difference and separation between real and virtual or what have they agreed to. The more communication you have there, the safe it is. Although that’s not always easy to do, and can cause issues and concerns too. You can get a divorce in most places now for any reason whatsoever. So the only answer or opinion that really counts is your spouses