How long did it take Tinky to get re-used to Jupiter the time he came back from your sister's?

I have found that with my cats (the ones that get traumatized the easiest) that each time they go through the trama, the recovery time lessens. Meaning, in your case, that each time Tinky acts crazy over strange cats' smells, her recovery time should be sooner. Hopefully.

The vanilla might work to confuse her into not recognizing that the odors are foreign. I have not tried it, though, so I do not know if it works or not.