by hornebrian40
Solid first story! Half a year isn't 18 weeks is this to show the protag is being tricked or a mistake?
Half a year is six months, or twenty-four +/- weeks. At eighteen weeks along it's not yours. Sperm doesn't not last that long, she needs to be telling someone about the pregnancy.
She was already pregnant and wanted to trick you to be the fatherr. That is why she proceeded to have unprotected sex.