With my obsession/compulsion, I just plain could not do it. As much as I would WANT... no CRAVE... to, I could not remain honorable enough to not push things with Her in a direction that Her parents would object to. Not to mention the LEOs.
If YOU think you can, then that's a different kettle of fish.
What to do? It must be with the entire family. Movie, roller skating, trip to the beach, things like that. You can't just outright buy a bag of groceries for them. You can't just buy a new/used bicycle for Her. You are in the best position to solve the problem, but the idea is to involved the entire family. Any... repeat, ANY extra attention given to Her will be instantly examined by Her father. Her mom might overlook things. Might. Probably not, though.
Family is important.
However, in my past (dark) experiences, very poor families can and will not only ignore exceptional attention, occasionally they will embrace it thinking they have access to a way to a better life. My experiences with that led to my extended vacation.