I have been reading more and more of the step parent sites and blogs, and have noticed the increasing use of abbreviations. I see that StepTalk.org has a decoder:
• sm = stepmother
• sd = stepdad
• bm = biological mother
• bf = usually biological father but every now and then some use for boyfriend
• sd = step daughter
• ss = step son
• bs = biological son
• bd = biological daughter
• dw = darling wife
• dh = darling husband
• dd = darling daughter
• ds = darling son
• poa = power of attorney