To all you people claiming that this guy is a "pussy", remember what our lord and saviour Kiyoshi from Prison School said.
"Touching her boobs right now is not important. What's important is how she'll let me touch her boobs again."
Ya'll are not looking at the long term goals here.
I know everyone is thinking the same but...
... Cousin-san should really let it rest. It's not cool to go after anyone's girlfriend especially when they are in a very healthy relationship, even more so your cousin's.