While on a business trip, Lillian met Leonard in a bar in Las Vegas.
They almost had a one-night stand and he proposed the morning after.
Lillian rejected since they had no prior relationship.
However, Leonard proposed a deal instead. He would pay her to marry him so he could get his inheritance.
Lillian was tempted by the huge sum and agreed since it was life-changing and she needed the money and was likewise interested in the possible romance. The morning after their wedding, Leonard left in a hurry. Since then, they were married for three years without personally meeting each other after marriage due to some circumstances. They only met again when assassination attempts for Leonard became common and one was almost successful.
Leonard fetched Lillian so they could go in hiding together for safety purposes. They went to his safe house on a secluded island. It was there that they got to know more about each other, got closer, and finally consummated their marriage.
