ARP reply without a request or a sign of it being a gratuitous reply?

https://en.cnki.com.cn/Article_en/CJFDTotal-SCLH200803028.htm

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The sender IP/MAC is sending it to a certain destination which has not requested any information. Is the information simply in transit? But it should not be, as the Target IP Address has not requested that information.

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The ARP reply does not have the signs of being gratuitous. The receiver IP did not send out a "who is" before getting it.

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Am I still simply intercepting something intended for someone else? If so, why is the target IP my own?

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This is from analyzing a PCAP file.

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In disclaimer---Yes this is homework. Yes I have looked into this. All I have been able to find on the topic is the above link on an algorithm to detect suspicious behavior...but is that the case? I am at a loss here...