Legal Advice On Immigration Status And Future Marriage

I am a U.S. citizen, and I want to marry my girlfriend, but due to personal and financial reasons, I cannot do so at this time. She and her family crossed the border illegally while seeking asylum. With the increased ICE raids under Trump’s administration, I am worried that she and her family might be deported.

If she is deported, how long would she be barred from returning to the U.S., even if we get married later? I am looking for legal advice or general guidance on what options we might have.

Since I am unable to marry her right now, what steps can I take to help her stay legally?