Awkward! Kim Kardashian Celebrates Lavish Engagement To Kanye West... While Scott Disick's Mother Is Dying

Scott said of Kim's party, "I'm sure I will miss out on something that's unforgettable ... but my mom needs me more than ever."

Then the cameras cut back to a gleeful Kris, saying in a confessional segment, "Tonight is going to be so exciting. And after they find out what's really going on, it's going to mean even more!

"I know first hand the real Kanye: He is a sweetheart with a huge heart for everyone that he loves. He's so many things that I don't think a lot of people really get a chance to see. He's the best guy to my daughter and really has her best interests at heart."

Meanwhile, in New York, Scott was arguing with his dad about how he had a bad diet that raised his blood sugar level.

"You know you're not supposed to be eating hamburgers, you had a heart attack," Scott said.

"Is red meat so bad?" Jeffrey asked.

"How come you didn't show up on time to order me lunch?!"

Scott said he arranged to have healthy food delivered every day but "they said, 'Your father won't eat it.' It's not going to be hamburgers and hot dogs!"

Jeffrey replied, "I know, but the stuff they gave me last time was s***."

Scott also argued with his dad about his behavior towards his ill mother.

"You've got to set a good vibe in mom's room," he said. "You're yelling, 'Wake up!' She just had a seizure. She's obviously sedated."

In a speakerphone call with Scott's friend, Chris Reda, Jeffrey said of his wife, "She took a turn for the worse. It's a roller coaster ride!"

Back at surprise party central, Kim texted Khloe that she was sick and didn't want to come to San Francisco, but the group didn't panic.

Kourtney then revealed that Scott's mom had had a seizure.

"Oh, no!" Kris said.

The "Momager" told the cameras, "Hearing that Scott's mom had a seizure makes me want to burst into tears, but I know I have to keep it together and be in the spirit of Kim and Kanye today and keep Bonnie in my prayers"

So it was a case of the show must go on as the family boarded a party bus which they soon found out was headed to the San Francisco Giants' home, AT&T park.

Greeting them at the stadium was Kim's best friend Alison Statter and famed jewelry designer, Lorraine Schwartz.

"I have butterflies in my stomach," Kris confided to the cameras, well knowing what was going to happen next.

Kanye's "team" was also in place, warning orchestra members on the field that roman candles would go off behind them.

Kardashian friend Anthony Schiller directed everyone into team dugouts to hide out until the magic couple arrived.

Khloe said, "I couldn't have written this better" as the couple arrived in a darkened stadium, and Kim's blindfold was removed.

As Kim and Kanye walked out to the field, as fans already know, fireworks went off and the orchestra played.

Khloe knew what was up and said, "I'm gonna cry. This is a movie."

"I just want you to know ... " Kanye told Kim before dropping to his knees and saying, "You want to know what? If you'll marry me."

"Of course!" Kim said as her family gasped behind the scenes.

"I can't believe this is happening," she told Kanye, giving him a big kiss after he presented her with the diamond ring.

Kim told the cameras, "The fact that Kanye has thought this out so clearly and perfectly. You can just feel how special this is."

It got even more special for Kim when, as was reported months ago, her entire family then poured out of the AT&T Park baseball dugouts to share the moment.

Kim told her sisters, "He said, 'I love you so much'. I'm like, wait, is this really happening? I was shaking."

Kourtney briefly filled in Kim on Scott's family situation.

"I'm going to call and share with him the news," Kourtney said in her confessional segment.

"See how it floats," Kanye smiled.

Jeweler Schwartz described how she and Kanye were up all night fussing over the mounting of the ring.

"It's the most beautiful thing I've ever seen," Kim confided to E!'s cameras. "Kanye really outdid himself."

After Kris and Khloe made speeches praising Kanye, the rapper was given the mic -- but all the normally-outspoken hip-hop maestro could say was "I love you."

Kim said, "I didn't see one sign of this happening. It was the surprise of a lifetime."

But then, the cameras turned back to Scott, who called Kourtney and told her he'd talked with the doctor.

"Her blood's not doing great with her kidneys, so they're giving her dialysis and checking her brain," Scott sighed.

"My dad's doing way worse. I just don't understand the diet stuff and I feel like he's at home eating God know's what. I don't know how to get this guy back under control."

Scott also said in a segment, that with the stress of both parents going downhill, "I'm trying to make sure I don't f***ing jump off a ledge."

Later, teary-eyed Kourtney got another sad call from Scott, who was talking about caskets, as the TV star had lunch with her friends.

And the rest of the family went to Kanye's concert in Las Vegas for one last big hurrah before Kim joined him on tour.

The family danced during Kanye's expletive-laced rap concert, as Kris told Kim how much she would miss her back at the family home.

"We'll be back for a few more months," Kim told Kris.