Rondie - the song you've mentioned sounds like "Valerie Wilkins" by Clive Harvey of Roaring Jelly. Later than the 60s though - it is on their second LP "In the Roar" -TOPIC 12TS420- released in 1981. See previous thread valerie wilkins

Kitty

VALERIE WILKINS
(Clive Harvey)

Valerie Wilkins comes to play, but she is always leader
She always gets her own way, the rotten selfish bleeder
And the reason she bosses me, I'm three foot seven she's four foot three
And besides she's 3 months older than me so I do what I'm told
'cause she is six and a quarter, and I'm just six years old

Who's that knocking on my door,
big Valerie Wilkins and she lives next door
Curses, curses, she wants to play at nurses and I want to play at war!

When she's in a good mood, she lets me play at cowboys
but today she's got her nurses apron on,
so we'll have to play at hospitals now boys
And there's no fun for me in store
for she makes me lie in bed for an hour or more
and pretends I've got pneumonia when I've only got a cold
'cause she is six and a quarter, and I'm just six years old

Who's that knocking on my door,
big Valerie Wilkins and she lives next door
Curses, curses, she wants to play at nurses and I want to play at war!

Then one day at teatime, I said I wanted to play with my rifle
But Valerie threw a tantrum, she spat straight in my trifle
And blimey she screamed at me,
she pulled my hair and she kicked me on the knee
causing me to spill my tea all on my sausage roll
'cause she is six and a quarter, and I'm just six years old

Who's that knocking on my door,
big Valerie Wilkins and she lives next door
Curses, curses, she wants to play at nurses and I want to play at war!

Three months later I realised, I was six and a quarter
I'd caught up with Valerie, could hardly hold my water
and I was happy as could be,
but when I told my mum she explained to me
You can never be as old as Valerie, and she began to laugh
'cause I was six and a quarter - Yeah! but she was six and a half

Who's that knocking on my door,
big Valerie Wilkins and she lives next door
Curses, curses, she wants to play at nurses and I want to play at war

[loud knocking]

go away I'm not coming out

he hasn't finished his tea

he's not well