Define Lesbian Exactly

So I just spoke to my mom. Which as an opening always leads to an interesting blog. My mom was just checking in and wanted to see how we are. We began discussing the In-Law situation and my mom's psychiatrist = Comical Kamikaze. She happened to mention that her Dr. says that I'm not a lesbian. I guess for some reason this has been an issue for my mother or something. Lesbians are attracted to women. I apparently am attracted to just one. My mom doesn't believe that we live like lesbians- whatever the heck that means? I informed her that we do. How else would we classify two women attracted to each other and living together in a sexual relationship. TMI I know. But, anyways , duh Mom!
She also shared with me that she and my father believe that when Beth's parents do know and start referring to her as Beth that they too will finally be comfortable to do so. Uh, it's been 8 years . Something else my mother didn't seem to recognize. She was shocked when I corrected her time line. First off what do Beth's parents have to do with the relationship between mine and secondly get over it already! To say that after 8 years my mother is apprehensive to accept change is an understatement.
You see my mother has this affect over me so that I completely go brain dead on the phone with her. It is always 3 minutes after I hang up with her that the synapses begins and suddenly I think of my clever responses. After we hung up I thought my goodness after all this time and many counseling sessions later she still doesn't get life. She's happy to remain clueless in her own little bubble.
I don't understand why this is still such a big thing to her. She got grandchildren from this. She is not around us to have to deal with issues on a daily basis. I am completely happy, well treated by someone who respects me and head over heels in love. So I know it's not that she is upset by my unhappiness or anything. Unless there is another secret I'm unaware of she is not going to be sexually affected by Beth's transition. If she really wanted to she could still be a part of seeing me on my wedding day in a beautiful gown, glowing with love. We are great parents and our children never go without. So I don't get it! She resides in California so it's not like this sort of thing should be shocking to her. For God's sake, half of her friends are gay. I say it's time to grow up, quit feeling sorry for yourself and using this issue as a crutch and way to get attention. Come on Mommy, be a big girl and quit playing pretend!