Hate Public Affection

I'm kind of glad that my brother girlfriend is gone back home for the rest of the holiday. They couldnt keep there hands off each other. My brother was cuddling her but stroking her leg and her butt. Then he would get in her face and kiss her face around. I dont mind if there is a little bit affection shown. But too much makes me and my other family members uncomfortable. I realize that they are in love but sometimes there are times where it is to much.