The link doesn't work for me. So, I'll go by what I've read.
Incest kinda freaks me out a bit, especially when it's intermediate family *glares at Erica with her KratosxLloyd-ness*. I see nothing wrong (eh, or at least it doesn't bother me that much) with cousins. But, brotherxsister?!? O_o You can love your family, just not in that way. I think you're confused with feelings when that happens. There are different kinds of love, and for some reason they end up getting mushed together sometimes. Anyway...I'm going off topic.
What's with the age difference? Even if they weren't related, why on Earth is a 28 year old sexually attracted to a 13 year old? Creepy pedophile!
Underage sex and teen pregnancy together. Wee~ Lol, what do their parents say to this?