Fishy Helper

We have this small household problem. Three nights ago, while I am busy watching chopped movie episodes of Juno, my father propped me to remove my earphones immediately. By the look of his face, he could have passed as the texas chainsaw murderer sidekick. He had been out to talk to our neighbor about the growing strangeness of our helper. Apparently, it was confirmed that our helper brings our own cooked meals for her security guard boyfriend. The "fishiness" started when my father went out early morning for his routine jog. As he curbed around the corner of Venus Street, he saw our helper carrying a bowl of food. Upon seeing my father, she quickly hid it behind our back. Since my mother (seventh from Annabelle Rama) was with my father at that time, my father chose not to react. Then he said there was this second time my mother left a plateful of "lechon" (roasted pig) in the refrigerator. Morning came and my mother rechecked the lechon contents and found it diminished considerably. She asked our helper about the sudden decrease (confident that none of the immediate family members did it). Our helper replied "ambot lng, asa pa man diay nako na dalhon". There was something wrong about her reply. My detective conan instincts say that the last few words were unnecessary and that it preempted something. Mr. Bernales, our neighbor also attested that when my father leaves to drive us to school, her fellow-helper (that of my grandmother's) would say "wala na si kuya lit". Then when the 2 of them are here inside the house, they would use their native language to converse. My father (already partially paranoid) reasoned that if they were not hiding something, why is there a need to talk that way. He said that he will be firing her when my mother comes back from Marbel. He could not imagine if this matter went up a notch higher. If food becomes objects, and objects become money, this thing surely should be stopped. Demo, there is something that keeps me from firing our helper. The thing is, she has been with us for the longest time possible. If the average stay of a helper in our family is 5 months, she has stayed for more than a year. She has been with us when uncle and his family came back, when our lola suffered much from cancer till her death and wake, when our cousins did not have a helper and offered to do their laundry. She has been trusted by another grandmother during her trips to the farm, to where my other uncle worked and has even sent off this uncle to Saudi. I really really like her a lot. She is more than a helper for me. I really don't understand but there's something special in the way she works. I will never forget the time she sends us off to school or the time I vomited and cleaned it up. It’s not just "because-its-her-job" aspect. I could not talk to my parents about this. This is something feely, emotional, corny and apparently, they are not like that.