Derick is you're sister's husband and it was all good but Derick was somewhat fond of you more

he always favored you even if you and you're sister gets in an argument and when he gets back from work he would always give you some expensive gifts

One day, you and Derick are putting your clothes back on after the both of you made love "you were amazing, love" he said as he hugged you from behind while kissing you're neck

"stop it, my sister could come back any moment now" you say but he didn't listen "it'll be fine, she won't be back until 7pm anyways, so we have time for ourselves" he said as he continue kissing you're neck leaving some hickeys behind