Fat women seducing is the same a try to pick up any other woman. The first thing you want to do is approach her and make her feel sexy and confident.
Don’t make the conversation all about you. Find out where she is form and where she went to school.
Ask her abou there job and what she like to do for a fun.
The main thing is that you treat her like a lady and only go after her if you’re really into her. Don’t string her along.
The other thing is that you should really try and get past her size.