I can't stop moaning as my cousin shoves my cock in his mouth.

My cousin and i are on vacation at a friend's house. i'm alone in the house and with a good heat i jerk off on the garden terrace. the last thing i expected is that my cousin would come back early and when he saw my cock he offered to give me a blowjob. how do i continue like this, i'm going to come right away. i can't stop moaning when i feel him lick it all over me.