A Florida mom who became a pillar in her small town after winning 'Volunteer of the Year' and raising money for victims of child abuse has been accused of grooming her boyfriend's teenage son and having a sexual relationship with him over a 15-month period.

Valerie Esposito, 37, was charged with three counts of sexual battery on a child under her custody, and one count of lewd computer solicitation of a child, following her arrest in Vero Beach last Tuesday.

She is being held on $325,000 bond.

Esposito, who is the mother of a 12-year-old boy, is accused of grooming the 16-year-old to be her lover whenever his father wasn't around and sending him sexual videos though text message.

In an exclusive interview with DailyMailTV, the father of the boy has accused his ex of being 'a predator' and believes she suffers from an addiction to sex.

Valerie Esposito, 37, has been charged with four felony counts of child sex after allegedly grooming the teenage son of her boyfriend, who accused her of being a 'predator' with a sex addiction, in an exclusive interview with DailyMailTV

Days before her arrest, Esposito helped organized a fundraiser for victims of child abuse and was awarded 'Volunteer of the Year' at a fancy charity event where she posed with photos with politician and law enforcement officials including Indian River County Sheriff's Office Major Eric Flowers (right)

The mother-of-one was arrested and charged last week and is being held on a $325,000 bond. She was busted after the father of the victim found sexual messages from Esposito on his son's phone

An arrest report obtained by DailyMailTV details how Esposito, who volunteered for a slew of charities in addition to working as marketing specialist for an insurance company, began coming on to the victim, now 17.

The boy told police last week that, sometime in July 2018 after he turned 16, he walked passed by Esposito while she was washing dishes in the kitchen one afternoon.

She allegedly 'backed into his genital area with her buttocks' and brazenly began to rub against him and told him not to tell his dad, the report states.

According to the boy's statement to police, he let her continue rubbing. She eventually pulled down his shorts, and performed oral sex on the teenager.

Esposito allegedly asked if he wanted to perform oral sex on her, but he declined.

A few days later, the boy said, Esposito came home from work and matter-of-factly asked him if he wanted to have sex.

'I'm 16 and my stepmom is asking me if I want to have sex, I'm like, sure,' he told authorities.

Esposito undressed the boy and herself from the waist down, and they had vaginal sex against the washer-dryer in the garage, he said.

On another occasion, the boy said he was sitting on the couch at Esposito's home when she returned from work one day and allegedly asked, 'Do you want me to suck you d**k?' the report states.

In all, the boy estimated he had intercourse with Esposito at least 25 times until she broke up with his dad and moved out of their home with her 12-year-old son.

Esposito's sick sex play eventually graduated to anal on the living room couch and in the back seat of her black Nissan Murano parked near a family pizza restaurant, the report reads.

She shared photos of the Black & White Centennial Masquerade Ball for the 'prevention of child abuse' earlier this month on her Facebook page where she described it as a 'lovely evening'

Esposito had volunteered for a slew of charities in addition to working as a marketing specialist for an insurance company. She is pictured above with Florida State Rep. Erin Grall

Esposito - pictured with Sheriff's Office Major Eric Flowers - allegedly denied having sex with the boy, telling his father she didn't 'need to talk about it any longer'

She was awarded 2019 'Volunteer of the Year' by the Indian River County Chamber of Commerce at a charity event last month

An arrest report obtained by DailyMailTV shows Esposito has been charged with four felony counts of child sex. The teen told police she allegedly first made sexual contact with him last July when she rubbed her buttocks against his genital area and told him not to tell his dad

The boy said he and Esposito often arranged for their trysts through text messages.

Police discovered a video on his cellphone believed to be Esposito masturbating. The teen told cops she sent him several suggestive videos and photos.

In time, the boy said he started feeling distant from his father and became 'afraid to tell him what was happening because he didn't want to lose him.'

He did admit to police he initiated several of the sexual encounters even if Esposito 'initiated the majority of them.'

The boy's father reported Esposito to police October 7 after his son was shot in the hand while firing guns on cans with his friends and ended up at the hospital.

It was there that the dad started browsing through his son's cellphone while at the hospital, and he found the text messages and photos the suspect sent his son.

When father and son sat down with police for interviews, cops had the dad call Esposito on a recorded line. He told Esposito he wanted to talk to her about the fact she had sex with his underage son.

Esposito denied having sex with the boy but told the father: 'It's a situation that's over with. I don't need to talk about it any longer.'

The victim's father told DailyMail.com Esposito had been wrestling with a sex addiction.

Esposito, the mother of a 12-year-old boy, from Vero Beach, Florida, allegedly had a 15-month sexual relationship with her boyfriend's teen son which began when he was 16

The teen also claimed his 'stepmom' had sent him several suggestive videos and photos of herself and alleged the two had anal sex on the living room couch and in the back seat of her car

'It's a crime of opportunity,' she said. 'My son was there, and she just wanted to have sex.'

He described a rocky seven-year relationship with Esposito where plans to marry never materialized.

'We were supposed to get married in September 2018,' he said, 'but we called it off.'

The father, 47, said he and Esposito broke up a month ago after he discovered she was cheating on him with another man.

'And there was another guy before that,' he said.

When asked if he holds his son responsible as well, the father said he doesn't.

'He's a child,' he said. 'He was under the influence of a predator. She should be in prison for the maximum time allowed. I don't care how long that is.

'She is broken inside and now my son could end up like her. I'm seeking counseling for him. He needs to know that's not how people behave toward each other. That's not how you treat women, and how he should be treated.'

Meanwhile, in the bourgeois coastal town of Vero Beach, word of Esposito's arrest has spread like wildfire.

Just last week, Esposito shared photos on Facebook from a fancy fundraiser for a child abuse organization that she worked on, with politicians such as Florida State Rep. Erin Grall and law enforcement officials including Indian River County Sheriff's Office Major Eric Flowers.

In September, she posted photos of her Volunteer of The Year certificate, courtesy of the local chamber of commerce.

Earlier this year, she published photos of her son's sixth grade trip to Cape Canaveral that she chaperoned.

And there are countless photos of her victim's family at outings and events.

'The worst is that police are telling me she still doesn't think she did anything wrong,' the victim's dad said.