You can contest forfeiture in a number of ways, including by arguing that you are an innocent owner. This may be difficult for you because, as you note, the assets are not titled in your name.
An additional difficulty may arise if forfeiture is a specific provision of your husband's plea agreement. In that case, the prosecutor may argue that your husband is not entitled to the benefit of his plea deal if the government is not able to collect on the forfeited assets specified in the agreement.
If you want to protect "2 houses and cars" from from forfeiture, then it's important for you to consult with an experienced attorney immediately; this is not something you should try to handle on your own.
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John's answer is on the nail. You want to consult a family law attorney who has some knowledge of creditor's rights. Although the house is in your spouse's name, you have a marital right in the property unless you signed a prenuptial agreement waiving same.
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