You just need to own it for that part.So, I bought the pregnancy test, I haven't used it yet, I don't know how, I don't know what I want it for, but I have it, maybe I should use it somehow?
The landlady suspicion might be the key, because I thought it didn't matter, but I have it only at 2, not at 5, any way I can raise it?
And yes, might be a bug, but I think the key is in the landlady's suspicion.
Both stats need to be 5 (max) for that last ending.