Even on the latest raw, he hasn't pregnant yet. He will get pregnant after his farewell sex.
Spoiler
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Euigeon is sick that. I think he is in rut and he is unstable. Like, he doesn't even know why (but it's just because of Chaewoo). So, Chaewoo after decide to cancel the contract and 'break up' (they don't even dating yet), he kinda thought "if Euigeon only think of him as sex partner and just use him for sex, then he can too" so he go to Euigeon's house and ask to have a sex with him. At first, Euigeon is reluctant because he is in a rut and he is afraid he cannot control himself, but Chaewoo insist. So, they have lots and lots of sex, he even knots.
After that Chaewoo left. Euigeon waking up after thinks that is just a dream because he is very sick at that time.
Long story short. A few weeks? after(I don't remember the exact time frame) when he wants to leave, he finds out he's pregnant and hide it from Euigeon.
Further spoiler...
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Euigeon finds out about his pregnancy, but Chaewoo claims that is his friend's (the alpha guy) child. (During this time Euigeon realises and acknowledges his feelings towards Chaewoon). So even when Chaewoo said the child is not his, he accepts it said he'll take of the baby. But, of course when an omega pregnant, his alpha pheromones comfort him, so yeah he will stay close to Euigeon sometimes and had to hold himself from feeling sick when with his Alpha friend just to hide it from Euigeon.
Euigeon gives him the money, so he can settle urgent debts.
Spoiler....
In the future, things have turned out for the better for his uncle after his father in recovery. So, they managed to pay all the debts.
About the contract...
They basically have been breaking it by having physical relationship.
What change.... Basically Chaewoo is determined to end his relationship with Euigeon so he wants to cancel the contract and his uncle even offer to pay for the contract cancellation. And iirc, Euigeon doesn't want Chaewoo to pay him back.
Can someone let me know, if possible, which chapter they find that he’s pregnant or not, no spoilers tho please