At the end of episode 3, Yu Zhai (Tavia Yeung) had an operation to do but during the preparation for it, her legs suddenly got weak and could barely stand.  Onto the next episode, it is explained that her spinal illness relapsed and in order to treat it, Yu Zhai would first have to abort her baby.

I did not expect that Yu Zhai's sickness would come back so early in the series!  It was heartbreaking seeing her tell Yat Kin that she didn't want to give up their baby.

Just a funny moment to lighten up the atmosphere.  The girls are having fun and playing around while the guys are at home baking horrible cakes.  Ben (Benjamin Yuen) made an awful tasting cake, Siu Yat (Derek Kwok) made a salty one and Yat Kin baked a curry flavored cake.  Both Siu Yat and Yat Kin lacks common sense :P

Yat Kin (Kenneth Ma) was against Yu Zhai's decision to keep the baby at first, but he knew that it would pain her more to give up their baby and so therefore supported her even though he didn't want to.

While they were at the hospital, one of Yat Kin's patient played by Ronald Law, wanted to commit suicide because of his sickness and the shock of his girlfriend's abortion.  At that moment, the doctors rushed up there to save him:

[a segment of their conversation]
Ronald: ....she's the cruel one, killing the baby!!!
Yat Kin: Do you truly want to keep the baby?  You really want to take care of it and watch it grow up?  If you don't have the capability to, why can't you let it go?  There are lots of things in this world that is painful to lose but you have to consider whether it's worth it, like your family, friends and the person you love.  You have to think carefully cause once you die, there would be nothing left and there's no going back.  You have to save your life and you will have a chance to start over again!

Even though he's saying these words to Ronald, I think it is what he wants to say to Yu Zhai and she also noticed this.

In order to cheer Yat Kin and Yu Zhai up in episode 5, Onion (Him Law), Mei Suet (Mandy Wong), Ben (Benjamin Yuen) and a few others decided to organize a party.  At the party, they exchanged gifts.  'Coincidentally' all the gifts were baby items and everybody gave their gifts to Yu Zhai.  Towards the end of the party, they also played 'Guardian Angel' in which each person picks out a random name and becomes that person's 'guardian'.  Guess who Yu Zhai got?

I personally really like these scenes of the housemen, doctors etc having a party together since everybody looks like they're having so much fun.

After the party, Yu Zhai and Yat Kin brought the gifts back home and sitting together with her mother-in-law (Gigi Wong), she suddenly reveals to Yu Zhai that Yat Kin and Yat Hong (Nathan Ngai) isn't her only children.  She actually had a baby before Yat Kin but unfortunately had a miscarriage.  Through this, she tells Yu Zhai that there's no need to push it (to have the baby) and that there will be future chances.

Back in her room Yu Zhai started to write in her diary, "even though I really want to look over the baby but at this moment, the one I really want to guard over is you, Yat Kin."  At this point, she pulled out the 'Guardian Angel' card she got at the party and on it was Yat Kin's name.  What Yu Zhai said was really touching.

Yat Kin brought home a hand-model thingy for Yu Zhai, saying that they can make a hand-model for their upcoming baby.  Instead of waiting though, Yu Zhai suggested that they try it out first.  This scene was very sweet and heart wrenching at the same time when Yu Zhai said that she decided to abort the baby.  Though it obviously pains her very much, like she said before, what is most important to her right now is Yat Kin.  Man, I teared up like crazy during this scene and to have Gigi Wong overhear them at the door, it just drove out more tears.  For Yu Zhai to decide to abort the baby is even more courageous than it is to keep it.