A 'good Samaritan' offered to help a stranded mother after her car broke down - but only if she sent him topless pics in exchange.

Bethany Pywell's car refused to start as she and her friend tried to leave a retail park in King's Lynn, Norfolk at 9pm on Friday.

The pair frantically asked passersby for help so they could get home to their children and were relieved when a Facebook friend offered to lend a hand.

However the conversation quickly turned sour when the man, known only as Luke, demanded a picture of Ms Pywell, 25, in her bra in return for the favour.

After asking where she was and her friend was stranded, Luke said: 'What's in it for me xxx'

A 'good Samaritan' offered Bethany Pywell (pictured) and her friend a jump start for their broken-down car but only if she sent him topless pics in exchange.

The conversation quickly turned sour when the man, known only as Luke, demanded a picture of Ms Pywell, 25, in her bra in return for the favour

A shocked Ms Pywell said: 'Seriously dude, we've both got kids we wanna get home to and [we're] freezing! Please just help us out.'

Luke, who Ms Pywell had never met and only knew from Facebook, then said: 'Yeah I will but send me a pic of you in your bra and I can be there [in] five mins xx.'

The mother-of-one pretended to offer a photo of her bra when she got home - but Luke did not believe her and insisted three more times for a peek at her underwear.

Telling Luke she had 'more self-respect' than that, she branded him a 'd***' and told him to 'go f*** yourself'.

Ms Pywell got her final revenge when she sent a picture of her muddy shoe and said: 'Here's your dirty pic. A***hole.'

Luckily another friend came to the rescue for the stranded pair and they were able to jumpstart their car and get home before 10pm.

Ms Pywell, who works as a carer, said: 'It's absolutely shocking because when you're in that situation you don't expect someone to take advantage of you like that.

'I couldn't believe what I was reading. I wanted him to see sense that he can't get away with doing that, but he obviously didn't.'

She has now deleted Luke, who had added her on Facebook months before, as a friend and blocked him so he can no longer contact her.