# I will throw her onto a sickbed ... into great suffering

"I will make her lie sick in bed ... I will make suffer greatly" or "I will make her very sick ... I will make suffer greatly" 

# those who commit adultery with her into great suffering

"I will make those who commit adultery with her to suffer greatly"

# unless they repent of her deeds

"if they do not repent from doing the evil that she does" or "if they do not repent of participating in her deeds"