When do you actually become one if you don't marry DP? I assume "officially" when you start living together full-time?
Therefore I'm an Almost_SM as we don't actually live together yet :)
We see each other very regularly and spend all weekends together, been together for 18 months.
DP has 3 children
One A_DSD 18yo who lives with BM and visits once or twice a week for tea and stays over now and again
One A_DSD 20yo who lives with DP full-time
One A_DSD 8yo who he has joint custody of and is with him/us about 4 nights per week.
So, whenever we stay at his house which is the majority of the time due to joint custody of A_DSD 8yo I fulfil the role of SM without actually being one
How do you all define the term Stepmum?