Wow! I love this! :D At first I didn't get it because I only saw the cake scene. Then when it switched to Harry and Severus I thought they had better have cast a silencing charm and a strong one at that! LOL. That would be one fun shag under that table, lol ^_^
The snitches on the cake is the first thing that caught my eye. Those are terrific. I also just love Snape's profile, his nose and his hair and the way his coat is open. Harry's arched and exposed neck is delicious. No wonder Severus can't resist ^_^ You did a wonder job! :D