See, now here's when I sign is as "Mom" and castigate your for airing the family laundry. Damn this registration (not really).
I've drawn a lot of lines in my posting (cough) career, and crossed a lot more than I intended. (I've still resisted the kid pictures, just in case any of y'all are diabetic.) I don't know if I buy the idea that a practicing writer will eventually sell out all of his or her relationships for the sake of the prose, but there's a lot of semiautobiographical stuff out there too. Who can deny that it's where a lot of our perspective comes from?
I don't know what to tell you. I've tried getting my brother to read some stuff I wrote, and my mom once. I don't think I really even held their interest.