When you sent him a piece of paper during potions class marked: need to talk to you alone, important, Regulus knew that you were still being dramatic.

After all, he knew you well. You had been friends since childhood, your family being pure-blood and friends with his. But you really got closer at Hog.warts, when you were sent back (unsurprisingly) to Slytherins together. Regulus had become your confidant, you could talk to him for hours and he listened to you — more or less — attentively. So he thought it was another girl story or something.

Regulus would never have thought that you would tell him that you had gotten pregnant.

at sixteen.

with his brother.

Thousands of thoughts were racing through his head as he looked at the five pregnancy potions that you had presented to your best friend, all positive. How was this possible? You were only in your sixth year? And your studies? And by Merlin, how did you end up in Sirius's bed in the first place?!