5 month weak Kitten Trying to nurse from my 1 yr prehistoric cat.?

We got Yuki when she was 4 months old. Yuki is 5 months dated now and just started trying to nurse from my 1 yr old cat, Jaina.
Yuki didn't approaching being held but we tried to do it every little bit to get her used to it. One day she launch herself from my husbands arms awkwardly and fell hitting our coffee table with her face. We came domestic from the emergency vet with Yuki with a black eye. (saddest thing you'd ever see) It be only after this event that she started trying to nurse on Jaina. Might this have effected her. mental nouns? Will it stop? Jaina growls and does not seem to appreciate the attention.
One of my cats used to do this when he was a kitten. In his grip, he was lucky because the other cat (a male) put up with it and "adopted" him. The older cat would even edify the kitten things and keep it clean (even when it needed to sit on the kitten to hold it down for bath time).

The kitten is presently 2 and has been successfully "weaned" (older cat made it stop when the kitten got too big and it started to hurt). Now the kitten is still convinced that the elder male is his "mommy" and will call for him if worried, but is otherwise a normal cat.
Awww, it does sound like she did somewhat regressing - It's just that she likely associates Jaina with her birth mother, human being a cat, and doesn't totally trust humans to make her feel better. She'll grow out of it - Try putting her in a different room than Jaina for a couple days, approaching your bedroom would be ideal - That way you can start building back her trust, and the more she bonds rear with you, the more she'll leave Jaina alone.
Answers:    Like us when we are hurt we try to comfort ourselves. As she actually have a "mom" around, she attempted to nurse off of an actual cat instead of on a blanket etc.

Jaina will put a stop to this ASAP esp. as she was not the mum. A kitten will sometimes nurse its entire life whether kept with their mum even if the milk has long dried up.

Sorry your little one have such a scare.
My manly cat can't find the gap (know what i mean)?   Is at hand a approach to exchange a cat from self noctural to diurnal?   My cats paw are really dry?   Found a kitten external, what do I inevitability to know?