Lack of vigilance

Her name Maryanne
A cousin of my wife
First met her when she was but a teen
Eyes wide open absorbing all she'd seen

Saw her twice a year
Her smile was such a draw
She loved going shopping with my wife
Never thought she would cause such strife

Or to put it straight
To have a crush on me
Whilst I doted on such attention
And stole a kiss which we do not mention

Alone she was near
Sat in my lap one day
And laid her sweet head on my shoulder
Think now of the things I should have told her

I whispered to her
"You're much too old for this"
She said cutely "Don't you like me then?"
"Of course I do, but just where will it end?"

With her snuggled up 
Wife opened up the door
Saw us and said "Go and pack your things"
Maryanne fled with me explaining

"Okay, she can stay"
Was her surprise remark
"I meant that you'd be be the one to go"
I sighed seeing Maryanne's face all aglow


Goodness knows what my brain does when I think about a prompt before drafting something but this is what emerged as I started scribbling. Apologies to those that may consider it in bad taste, but clearly the husband was careless from the start.

Image found at https://www.pinterest.com.au/pin/778419116824687015/