A sociopath will sincerely believe that the girl killed her sister so she could see the guy she fell in love with again. He showed up to the first funeral so obviously he'd probably show up to the second.
My sister gave me this test and was baffled and argumentative when I said I didn't know, there wasn't sufficient information in the question to say but I'm sure she had her reasons. Apparently my sister and many others in my family are sociopaths which explains so so much 🤣