ARRESTED: Sara Domres, 28, was arrested after a pal of her teen lover told police

A TEACHER allegedly slept with her student lover – while her fiancé was having his bachelor's party.

Sara Domres, 28, spent the night with the 16-year-old in a motel room before sending the boy sexy selfies later on her honeymoon.

The boy claims Domres took his virginity and romped with him about 15 times while she was planning her wedding.

She called him "Baby Boo” and they bonked in a car all over town including a park-and-ride area and his driveway, he told cops.

Her husband caught them once while they were shagging in a restaurant car park, leading to a "verbal confrontation," the teen said.

But he has vowed to stand by her.

Sara Domres arrives at court  

WORRIED: Sara Domres grew anxious over how the relationship would affect her marriage

Police recovered almost 1,174 texts between Domres and the pupil.

Their alleged eight-month affair started in May 2015 when Domres texted the teen, say court documents.

Passionate messages led to meeting up and eventually sex.

Domres later appeared to be worried about being found out, texting: "I love you, too, baby and will forever.

"I'm just saying that if you ever don't, please still love me enough as a person to know how much that'd hurt me.

"You are amazing and mean the world to me. I want to be yours forever."

The English tutor wrote in one: "Hopefully you've been thinking of me Baby Boo.

"I should go because he will be home soon. I love you.

"Be good, think of me and no one else! Ha ha."

The student told investigators that Domres asked him if she should marry her fiancé.

And texts swapped between just before the alleged motel tryst said: "You're extremely attractive to me!!! I can't wait for our night we are doing it no matter what!!!

"I love you too!"

Motel meet-up

PASSION: Sara Domres, 28, allegedly spent the night in this motel room with the teen

Sara Domres' police head shot

SEX: Sara Domres allegedly bonked with the teen in a car

Hand-written love notes, some passed during class at New Berlin West High School, Wisconsin, US, included one saying "Baby Boo, I love you now & forever!

"Please be mine forever & ever. Always, your baby girl.

"P.S. Good luck on your quiz."

An exchange of notes during a lesson said: "We will have to plan something soon. I want a night again. Xoxo.

"Yes! Definitely soon. I really want another night with you too baby boo!

"I want to do you NOW!!”

Text between Sara Domres and her victim

RAUNCHY: More than 1700 texts were exchanged between the pair