<human>: Can you provide a brief overview of the text?

Hey Reddit, so I am coming to all of you with relationship advice because I have no clue how to approach something this personal with my SO of such a short time. Well here we go!!!

My gf and her mom have had a very rocky relationship after her past relationship with an ex didn't work out. Apparently the mom and her ex's mom were close, they wanted my present gf's relationship with her ex to work out! It obviously didn't, yet her mom still tries to push them together. Because of her mom's obsession, my gf has been keeping the relationship with me a secret. (i know its messed up) 

Well her mom just had an insanely huge argument with her ending in a screaming match.... It wasn't about our relationship but I just want to help her through this. I dont know how to approach it though... Please help!
<bot>: GF has a bad relationship with her mom and had a huge fight. How should I approach my gf and sympathize with her?