Is this normal for a proposal?
This story is a bit complex so bear with me...today I was talking to this girl who opened up to me about something very personal, kind of suddenly. She was talking to me about a famous man she knew for a year before his death (I'm not giving any hints, I want to respect his privacy and his family's, especially since he wasn't as well known towards the end). She messaged me kind of out of the blue because she noticed I was a fan, so out of curiosity I asked how she knew him, then she said "can we please stop talking about this, it's really painful" which I understood, so I didn't continue to respond.
Then a little later she messaged me again and told me they had a thing going on during his final months, and he proposed to her out of the blue. And he made her promise him she wouldn't get married to anyone else so she will be his in heaven (he was terminally ill and knew he didn't have much time left). I thought that seemed unusual, like, most people are okay with their spouses remarrying after their death, but I understand everybody is different. She claims she is close with his friends but she was kind of vague about that, except she told a close friend of his about her promise to stay single forever, and he didn't respond.
My gut feeling is telling me something is off, but I don't see any solid evidence she is lying so I don't want to be insensitive and assume, know what I'm saying? She's messaging me a lot and seems nice, but if she's lying or delusional I don't want to encourage that. But of course I'm not going to ask her if she's lying. So does the proposal/promise sound normal to you? Do you think I should continue to talk to her? Don't comment if you're going to be nasty about spiritual beliefs please, I'm a spiritual person. Thanks in advance.