I am the SM to twin 5 year old boys (E&L for description ease). I also have a 8 month old biological son. We have the twins about 75 percent of the time, soon to be 100 %. This is all with the BM having "sole custody". DH is "supposed" to have them Sunday and Monday (his weekend from work when they originally went to court) which has now turned into Friday to Tuesday morning. They have school Tuesday, Thursday and every other Friday, so really she has them a few evenings and on Wednesdays they either come back over to our house or go to their grandma's (my MIL). More on the MIL later.