He sent her a string of texts, one of which read: "I deserve to know whose (sic) been playing daddy." However, Miss Sherwood eventually revealed in a phone call on the day before the murder that she was seeing Mr Pencott.Mr Evans said Spaven reacted furiously, calling her a 'c***, dirty bitch and slag', and accusing her of seeing Mr Pencott 'for ages'.She later told police she could hear him screaming and the sound of items being smashed u p.
Two months later she started seeing Mr Pencott who she knew through Spaven - causing her ex to fly into a rage.
Michael Evans, prosecuting, said: "After the relationship had come to an end the defendant would send text and Facebook messages to Miss Sherwood on a daily basis.
He would declare his love for her and if she ignored his reply he would switch to being abusive and insulting." Spaven soon discovered Miss Sherwood had a new partner - but didn't know it was his friend.
On the day of the murder, June 4, he went to his GP to request a DNA test to find out if he was the father of his 20-month-old son.
In the hours before the killing, furious Spaven texted a friend saying: “They’ve got to pay for this”.
And in a final conversation with his ex, he said: “I know Richard finishes work in ten minutes, we'll see what happens when I drive past him.” He waited in his Audi A4 for his former pal to finish working his shift at 2pm and then ploughed into him at 40mph.
Spaven, of Bircotes, Notts, and Miss Sherwood had been together since 2009 and had a son together, Marshall.
A bodybuilder was "blinded with jealousy" and "bent on revenge" when he killed his love rival by mowing him down as he cycled home from work.
Sam Spaven, 27, drove his grey Audi head-on into his friend Richard Pencott as he was returning from work on his bike.
The pair had worked together at DHL and attended the same gym in Harworth in Nottinghamshire.
But Spaven snapped after discovering his ex-girlfriend Amy Sherwood, 27, had begun dating dad-of-two Richard.