The day she realises. [COMPLETED]

This could be a happy ending...

It was the last night before Zosia and Ollie were leaving the lodge and so they decided to go late night scuba diving.
...
"This-this is amazing. Look at all of the colours Oll!" Zosia exclaimed staring at the fish. She used her water-proof phone case to take photos in detail. Romantically, Ollie pinched Zosia's toes and spun her round to meet his gaze.
"I love you..."He reported leaning in placing his helmet in hers.
"I love you more..."Zosia replied.
The couple carried on swimming until it began to get too cold. They swam to shore and handed in the wetsuits.
Returning to the lodge, they started to pack for the long journey home.
"Ollie... Where's all my underwear?"
"You don't need any.."He teased, holding all of it behind him.
"Give it back!"Zosia screeched.
"You'll have to fight me for them!"Her husband teased.
"Oll!!"She laughed as she tried to grab her underwear of him.
He pushed her to the bed and kissed her passionately removing her t-shirt.
Smiling, he gave Zosia her underwear back.
"Thank you!"She said.
"You're welcome Dr Valentine."Ollie flirted.
Just as she was about to reply, she dashed to the toilet.
After 5 minutes, Ollie asked his wife,"Zosh, are you alright?"
"No.. Not really Oll!"She only called him Oll when she was terrified or amazed. Realising that she wasn't exactly happy, Ollie started stroking Zosia's back as she emptied her stomach.
"It's exactly the same as before: Sick, terrified, clammy... What if I am pregnant Oll? What would we do?"She worried frantically.
"It'll be fine... Whatever..."He calmed her down but deep down he knew that she wasn't ready for another pregnancy. 
"How about we call it a night because we have a long journey home tomorrow?" Ollie offered taking her hand. Ollie swooped her up and kissed her.
"Thank you for always being there for me!"Ollie whispered holding his wife close.
"I always will be Ollie."She replied kissing him back. Ollie managed to put on a smile.
"That's what Tara once said."He thought to himself sadly. Without telling Zosia how he felt, he pushed her on to the bed to enjoy the last of their freedom for a long time as Cara had started to burst into their room unexpectedly.
...
Breathlessly, Zosia picked up her clothes from the floor and restarted packing. She looked up at the clock as it chimed 4. They were leaving in 2 hours.
Ollie helped her carry her suitcase to the taxi as it pulled up outside. She pulled him into a warm embrace,"Thank you Ollie, this has been the best week of my entire life!"
Ollie simply smiled as he helped his wife aboard the taxi. Taking a final photo of the lodge, they drove off to the airport.
The lights lit the runway like little specks of dust in the night. Although it was 5am, it was still dark outside as it was drawing into the winter.
...
As the 6 hour plane journey grounded to a halt, Zosia yawned.
Ollie took her by the arm and carefully guided the half-asleep doctor down the stairs. She put her foot on the concrete floor and already felt the cold as she shivered.
"Bloody UK!"She muttered as Ollie offered her his jacket.
"What time is it Ollie?"Zosia asked.
"Well our plane left at 6 and it took 6 hours and Greece is 2 hours ahead, so it's 10am!"He calculated.
"Right... Come on then, we have to get our suitcases!"Zosia dragged his hand. Ollie laughed as he saw his wife barge through queues to reach the suitcase racks.
After they collected their belongings, they waited outside for Guy to arrive to pick them up with their daughter-Cara.
10:30 sharp, Guy pulled up outside the main entrance and opened the passenger doors for his daughter and son-in-law.
"Thank you Mr Self!"Ollie states as he helped Zosia into be car.
Driving home, Guy asked,"Did you enjoy your honeymoon?"
"It was amazing Papa! Ollie booked a perfect little lodge in a beautiful island off Greece!"Zosia described.
After they talked for a bit Zosia turned to her daughter,"Hi sweetie. How was your week?"
"Boring!"Cara exclaimed. She was still too young to understand how words affected people.
"Shush Caz..."Ollie half laughed.
"Sorry Dadda..,"She trailed off. She hated disappointing her father.
"It's alright sweetie!"Ollie said stroking his daughters hair.
"I love you!"
"I love you more Dadda!"Cara replied.
Ollie smiled at Zosia. He had a wife whom he loved and a daughter which whom he could not live without.
"This could be a happy ending..."Ollie thought to himself.