Family Ties by Danielle Steel

This one was more typical Steel style.  It centres on Annie who in her 20's becomes guardian for her sister's 3 children.  The kids grow up and Annie finds herself at a crossroads having 'given up' her youth to raise the kids.  The kids are involved in different lifestyles and the problems that accompany them (abandonment issues, relationship abuse and cross-cultural issues).  It is what it is.  A time passer novel.