Do not allow a third party into your relationship. A few years ago, myself and
my ex-gf had a mutual female friend. She was quite attractive and about 20
years old. She told us that one of her fantasies was to sit in the same room as
another couple having sex and watch. It must have been the wine or something,
but we thought it would be fun to have someone else there as well. Anyhow,
while we were having sex, the other girl stripped off and started touching her
rather full C-Cup breasts. She also began fingering herself and moaning loudly. My GF got very
jealous as she could tell I was looking at her whilst having sex with my GF at
the same time. She obviously thought I was fantasising too. She told our friend to stop. Needless to say, both parties fell
out. It led to a string of rows in our relationship as well as my GF accused me
of encouraging her to be there in the first place and finding her more
attractive. Soon afterwards, we went our seperate ways....