Mom and your friend have their own disfunctional issues...big time!!...walk away while you can.....No run, don't walk and don't look back!

p.s it reminds me of a sick relationship I had in college with this guy. He too had a mom like the one you describe. She too lost a spouse, and decided to replace that spouse with her son. At Christmas one year, this guy, I'll call him "Sam" wanted a stero from mom for Christmas....I was there...what did he get but a rocking chair for the living room........Now there is a red flag for you!!!....and ...I was out of there!!..END OF STORY...!