Kimberly was forced to leave Big Brother after experiencing intense pelvic pains, and doctors later told her that she had an ectopic pregnancy and had sadly lost the baby.
Steven, who was still inside the house at this point, was unaware of Kimberly's medical condition, only discovering the news when he was evicted last week.
BB'S KIMBERLY KISSELOVICH CONFIRMS SHE DID FALL PREGNANT IN BB HOUSE
'I'm trying to get over and accept what's happened' said Steven, on receiving the news of his girlfriend's miscarriage. 'We're now having to have conversations about children. It's planted the seed.'
The couple have only known each other since entering the house in June, but their relationship escalated quickly after living in such close quarters, and the couple admitted sleeping together several times during their stay.
BB'S HELEN WOOD AND ASH CUT ROMP SHORT AFTER HE ADMITS: 'I CAN'T BE AD'*
During one of these under-the-cover romps, Kimberly says the condom split, and she became pregnant.
And now Steven has said he is 100% sure he wants to marry the Playboy model, despite only knowing her for a matter of weeks.
Kimberly seems no less excited about their union, posting to her instagram a picture with the caption: 'I have never been so happy.'
Could this be the next BB wedding?