Possess tsunade

While massaging her he was just going to touch her pussy,which would make her alert that the shizune standing and massaging her is not the real shizune and could attack her immediately.

To avoid that risk he thinks of possessing tsunade and try fulfilling his dream.

He then comes out of shizune's body and then shizune passess out n fall on the floor and tsunade wakes up and was not aware of what happened and tried to wake up shizune while she was half naked and then jiraya in his ghost form goes for tsunade's body.