Eventually, as you grow into an adult lion, you come to appreciate Mimi's care, and begin to fall in love with her.
While in a romp through a particularly fragrant and flowery corridor in the deep jungle, you decide to pop the question.
"Mimi? I'm sure I've been a great cub for you...and I wanted you to know I really appreciate your taking care of me.", you say as you blush.
Mimi, taken back by this, purrs and gives you a loving cheek lick with her raspy tongue, which as the nice side effect of soothing a few itchies on your face. "Why thank you...I've found a missing element in my life. You have been quite the companion."
"Anyway, I was eh, wondering. How would you like to be a mother for real? I am old enough now to, you know..." you blush again.
"I know what you mean...but if your thinking of screwing me, you're quite shallow unless you intend to take care of the kids."
"I wanted to be a father all my life...so...let me ask you."
"Mimi, will you marry me?"