Well since the mother was dating someone else by the time she had little Evelyn, might not have had the opportunity.
I wonder what Nicoles home life was that it was normal to date someone other than the baby's father when pregnant?
Assuming you mean Noel, they were all close friends (bong buddies, I'd guess). Earlier stories said Andy and Casey were best friends.
As for her broken home life, earlier threads gave some indication that her mother has some issues, too.