'Irresistable' singer Jessica, 33, uploaded a black and white shot to Instagram on Tuesday (25 February), showing herself and Eric canoodling in bed.
She added the caption: "Goodnight kiss. I love this man."
Jessica and former American football player Eric have been together since May 2010, when they were introduced by friends, becoming engaged in the November of that year.
Two weddings have so far been planned – and then called off after Jessica fell pregnant. First, they welcomed daughter Maxwell in 2012, followed by son Ace in 2013.
Jessica joked last year": "We've had two different wedding dates, but he keeps knocking me up! We're doing it very backwards, I know... I don't know, I'll just keep my legs crossed, I guess, this time."
Wedding date number three has been set – although Jessica is keeping tight-lipped about when exactly she'll be walking down the aisle.
During a chat on Good Morning America earlier this month, she would only say: "I have a date. I'm super excited… It will be soon enough!"
After the wedding, meanwhile, she says her focus will be on returning to her singing roots.
"I want to sing again. I want my daughter to see my on stage. My fiancé hasn't ever even watched me perform, which is crazy. That's my passion and my love.It's everything that I am."
She added: "If I can give my kids anything it's support in their dreams and who they want to be."
Jessica was previously married to singer and TV presenter Nick Lachey. They married in 2002 but filed for divorce three years later. Their marriage was documented in the MTV reality series Newlyweds.
Celebrities who have married in 2014 in pictures:
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