<human>: My son is 16M

I had my child pretty young, I was always attracted to females but I got a boyfriend to make my dad happy. He was a homophobe. Myself and his father were partners. He got me pregnant and he pretty much demanded I get an abortion, I did not want to. Its hard to explain but I loved my kid as soon as I found out I was pregnant. 

His father said he wanted nothing to do with my son or me. I don't know where he is, he vanished off the face of the earth. My son became my number 1 priority in life and because of that I have been single. 

I met my partner about 6 months ago. Myself and her had a conversation last week and she said she would like to meet my kid. We both figure it's not nice for me to keep lying to him about where I go on Saturday and Friday. 

The reason I have put it off is because Bullying in schools is bad. Especially in American schools, and I know he plans on going to a university in our home town. He has made it clear he has no intention of moving across the US when he graduates to go to college.  

I plan on telling him when he get home, but I am scared of the way he will react. I am scared he may think less of me. I am scared I may cost him his relationship with his girlfriend, he has mentioned she hates gay people. I am scared of the way he may react to me having a female partner. 

I have spoken to him about his girlfriend views and he always says " but mom she is so freaking hot". 

How do myself and my partner breaks the news to him? I have never been this nervous before.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I plan on coming out as lesbian to my son and introducing my partner. I have never been this nervous and scared before