Today was a little bit of a breakthrough for us on the FLR front. Sucking her nipples without her first inviting me to do so is off limits. In fact, she later decided that touching and cuddling them without her specifically asking for it will no longer be allowed.
This is the first real "rule" that my wife has come up with on her own. She decided on this just before I was about to wrap my lips around her delicious nipple while she was watching TV. A long teasing session left me throbbing and she wanted something to keep that energy going.
The result of this is that I am now totally fixated on her tits. I am constantly thinking about touching and tasting them, not only because they are beautiful and irresistible but because it's forbidden! Forbidden fruit tastes sweetest.
I've seen a change in her as well. Just as I am now far more focused on her breasts, she too seems to be enjoying teasing me with them far more than she did previously. She knows how much more I crave them and is beginning to enjoy that she is getting the reaction she wants by denying me access to them.
At this point I'm not sure how long we'll keep this up or whether it will be the first of many such things to our budding FLR games - I can only hope.