Family-based I-485 filing question re: Expired BCC Vi

[JBird2001]

My fiancee is from Tijuana, Mexico and she has two children aged 11 and 14. They all have BCC laser visas, which allow multiple crossings into the US. I am a US citizen and live in San Diego, 25 miles from the border.

Here's my concern: her 14-yr old daughter will turn 15 on Jan 8, 2008, at which her BCC visa expires.

If my fiancee and I get married after the expiration date of her daughter's visa, and I file for the family-based adjustment of status I-485, will that affect our application process?

In other words, do my fiancee's and her children's BCC visas need to be current in order for their applications to be approved? Will the daughter's visa need to be renewed before we can move forward?

Thank you in advance for your valuable advice and input!