There once was a boy who cried wolf
His family lived near to the Gulf
Even so, there still needs a third rhyme for the last line.
Tricky. Too tricky for me Leia. 
How about engulf?
There once was a boy who cried wolf
His family lived near to the Gulf
They found to their cost
That all their sheep had been lost
So they went to their club to play golf
The wolf had scoffed all of the sheep
The wolf had scoffed all of the sheep
Oh dear, now I won’t get to sleep
The wolf had scoffed all of the sheep
Oh dear, now I won’t get to sleep
You could always count goats?
There are no single syllable English words that rhyme with wolf. Suggest Tango starts another rhyme.
The wolf had scoffed all of the sheep
Oh dear, now I won’t get to sleep
You could always count goats?
Or I could have my oats? 
The wolf had scoffed all of the sheep
Oh dear, now I won’t get to sleep
You could always count goats?
In their soft kid coats
The wolf had scoffed all of the sheep
Oh dear, now I won’t get to sleep
You could always count goats?
In their soft kid coats
That’ll make sure my sleep is deep.
I think I’ll have myself forty winks
I think I’ll have myself forty winks
Then I’ll have forty drinks
I think I’ll have myself forty winks
It’ll help to re-charge me, me thinks
The wolf had scoffed all of the sheep
Oh dear, now I won’t get to sleep
You could always count goats?
In their soft kid coats
But the loss of the sheep made me weep
Jack Horner once had a pork pie
I think I’ll have myself forty winks
Then I’ll have forty drinks
Into a deep sleep I will fall
I think I’ll have myself forty winks
Then I’ll have forty drinks
Into a deep sleep I will fall
So into bed I will crawl
Rubbish! Blows big raspberry. 
I think you’ve all been on the lemonade tonight. 
Better than nowt. :-p
Nah, it wasn’t better than nowt :-p
I think I’ll have myself forty winks
Then I’ll have forty drinks
Into a deep sleep I will fall
So into bed I will crawl
Then I’ll awake ready for more high jinx.
I’ve yet to eat my Christmas cake
I’ve yet to eat my Christmas cake
That took about two weeks to make