You know as long it remains between consenting adults and that no child or animal are being hurt in the practice of the activity, you can pretty much do as you like.
You just need to be aware of what are the paradigm of each are and how the compare to what you want to achieve.
That being said some aikidos are naturally close to JJ or judo and some jj are quite close to aikido. Since you instructor practice both it is likely that you are in a case like that anyway.
Thank you for your answer!
Since I will practice both arts simultaneously with the same amount of time, I think there may be a cross path. Do you think that I may mix techniques from Jujitsu in Aikido randori by any chance?