First off, you sound like you need a hug, and a friend to pray with you.

Second off, my first piece of advice is chill. I mean it... just relax, and listen to her. The more you listen to her talk about this the more you’ll learn her feelings on it. Sometimes the hardest thing to do as a parent is just sit quietly, and let the fear rage on the inside only. My second piece of advice is. She needs her dad. Girls need to have quality time with their dads. Some ideas would be coffee dates, movie dates, ice skating, since the holidays are coming up they could go out to shop for fun decorations for her room. Or maybe start making a pack to go to confession once a week during advent. Get those graces up! Also, family advent candle lighting. My husband is new to the whole practicing faith thing, but I started since we were married having him say prayers on all Sunday’s during advent (or lent) when we light the candles. It’s amazing bonding time for the family. He needs to make all his time pressure free, and not make this issues the center of “date.” Just act natural, and talk about God, His love for us, what He expects from us. Family catechism study is another good idea. Third, just pray, and monitor what you can at home. Watch the internet, watch the phone, watch the tv. There are some great routers that will give you files on all the families search websites including the ones that are in the hidden browser. Please, talk to your priest, and get support for your family. You can do this guys! She’s only 12, and that’s not to late to Guide her!

Thank you so much for this!  

And please note, that's what a 12 year old girl is, a child - not a baby.

When someone calls a child a baby, that's obviously a relative, rather than absolute, use of the term.  I'm not stupid.

Stupid advice given from one who is obviously already brainwashed.
The 12 year old is to listen to the parent, not the other way around. This is a traditional Catholic forum, not a public elementary school.

If you don't listen to the symptoms you can't find a cure. Something is seriously wrong in this girl's life and her parents need to figure out what it is. At her age the evil influence is almost certainly a relative, a family friend or someone at school. If the parents don't listen how are they going to discover the source?  When my aunt was 17 she thought she was a lesbian. Instead of dealing with the adult family friend who seduced her all the pressure was on my aunt who ran away and except for the occasional appearance she never came home again until she was in her 60s and dying. A lot of stuff can be nipped in the bud depending on how parent handles it.  Stephen King ( a terrible human being) admits that his daughter is a lesbian today because he was intoxicated for her entire childhood.  What was it like growing up with a mean drunk who was also living on cocaine? Had he behaved like a man, his daughter would not have had her mind poisoned and would not have turned to a "kindly" older woman who seemed to her to be helping her deal with her horrible home life.