sleepover time

Ethan had his first sleepover the other night, his "cousin friend" Gunnar. Last summer when Ethan's Aunt Brittney married Gunnar's Uncle Brandon they told me that meant they were now cousins. Later Ethan said Gunnar was his friend too so the boys decided to call themselves cousin friends. Anyways, Gunnar came over to spend the night on the one and only night of snow we got this year. The boys had a lot of fun playing outside and then stayed up really late watching movies. The next day they played up until the time Gunnar had to go home. Ethan told me he wants to do this every night now........what have I started?