@Misak Not blood related. The older one was adopted into the family because the couple was having trouble getting preggo. Then the younger was born.

@Cupid is so dumb   Read it already on Lezhin. It's not good for my baby here. You do get to see the power of his hubby though which was really neat. Also, sadly..next chapter is end of season 1.

@Ur mom you asked a question. I answered it. No need to be rude especially since you didn't say, read for free.
Also some of us use these types of sites as a "is it worth it" or an extended preview then buy the books of the ones we like because artists deserve support. They can't live off of and pay bills with your enjoyment. 
$5 on Lezhin gets you quite a bit and supports the artists so they can keep putting out content you enjoy. Lezhin also has a way you can get free coins too.

@Ur mom Lezhin.  The first 8 chapters are already up.

@Manhwa Lover you can find it on this site.  I won't spoil it.  It's pretty good except for the very end of the side stories.