Who cares? If you have a small penis, so what. She obviously doesn't care that much as she hasn't left you and is looking for ways to make the sex enjoyable despite it. She also never was rude enough to say it to your face. She's a keeper.
well at least she's trying to work with it...she could have just dumped you and moved on to someone with a bigger penis. And she didn't bring it up to you and make you feel bad about it, sounds like she was trying to overcome something that could negatively affect your sex life because she loves you enough to stay with you. FYL though for having that small of a penis.