Is this considered cheating?

So my partner is in a specific subreddit that's nsfw and they posted one of those images where it's like "send me any picture and I have to jerk off to it", they've made a couple posts like it so I'm assuming no one did the previous times but the most recent one was yesterday, so is this cheating?, with "challenges" like that usually the receiver doesn't send anything back and ik they would never send them so I'm not sure
Is this considered cheating?
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