Mark Wahlberg received the news of his sister's death on the same day that his daughter was born. The 'Boogie Nights' star mourned his sister while experiencing the joy of first-time fatherhood.
Wahlberg's sister, Deborah Donnelly-Wahlberg, passed away on 2nd September, 2003, at the age of 43. While being treated for a suspected kidney stone in Boston, Massachusetts, Deborah suffered from a heart-attack while her brother celebrated his daughter's birth.
I didn't find a lot on Michaelle Wahlberg, except that she was in prison for drugs in 2008. Haven't found any other current info yet.