When confronted she says that she's not homophobic then doesn't make sense at all with: «I just wanted to be happy like everybody else». She knows that mister is all alone and then decides to try and separate him from the one he the adult man of 36 y.o. chose to love and be happy with regardless of what people may think. She herself chose to run and be miserable in her situation and wants the same for him by making excuses about what's acceptable or not. Shoulda just minded her business indeed. Notice how she neglected her grandmother to meddle in other people's business? Thinking that she can control someone else's life rather than dealing with her own
It's such a contrast between Carcel not even thinking about taking Ines with his sweaty body and Oscar having all STDs in the world and still doing the worst things possible