As a Mummy to a little girl who's got a Step-Mummy, such things like this don't offend me. Someone accepting and loving my child is enough. Others having an opinion on it when they don't know the whole story/set up offends me more as it is so so personal to each and every situation.
THIS.
Whatever our issues with Lauren, it's plainly obvious to see how much time and effort she spends making sure Archie is included.
My kids see their dad/sperm donor sporadically but I hope that one day, when his new wife has divorced him (as I hope she does because she's way too good for him), they keep in touch with her as she's awesome.
Every situation is very different.