Great question! Your experience with your mom is like what I myself worried about, and have seen often happen to other lesbian parents.
Identity of donor:
We decided not to tell anyone at this time the identity of our known donor. I knew that some folks would see the baby as mine and donor's and be looking at our son for "relatedness" to this other person. Our known donor is not a co-parent in any way, and we did not want the perception to creep in that he was a parent of our child. I knew my family would constantly be wondering if baby looks like "HIM" and that sort of thing, and we did not want that to taint me and DP establishing ourself as his sole parents.
We do plan on letting our son know loud and clear his origins, and at that time we will be more open with the extended family. By then they will have grown used to the idea that baby is half mine and half DP's. He's amost a year old and they are starting to make funny comments like "he has DP's hair color" and then they remember :LOL
For people outside the family - like the waitress we had last week who said "Are you lesbian moms! Did you order sperm off the internet! How did you pick which guy's sperm, did you see pictures?" There are dumb nosy people all the time. There is a line I walk between wanting to break down the stigma and oddness of donor assisted reproduction. So I don't want to act like it's secret or something we don't discuss. But you also don't want to tell strangers your personal stuff, KWIM? I think it's very similar to open adoption. People wanna know "the dirt" (like the scoop on birthmom), and you want to be open and not show shame or secrecy BUT you also don't want to tell personal info to someone who doesn't even know baby's middle name!
That is kinda my guage, by the way. If someone asks a personal question and they don't know my baby's middle name, then why the heck should I tell them personal info?
The most probing questions I have encountered are from other gay folks - DId you have an orgasm or not? Home or clinic? Washed or frozen? IUI or ICI vials? Medicated or unmedicated cycles? Pillow under the ass or no pillow? Instead cup or not? Being asked stuff like this can be pretty embarassing and weird.... cause to me it's a little like asking a straight couple what position they did the deed in when they got preggers! Asking on a message board is different, of course.... it's when people ask you the specifics in person that it is just weird. The other thing we get asked a lot by other gay folks is how "romantic" it was... It is like they want to know if it's like the little movie scripts or not. You'd never ask a straight couple if they got pregnant during a romantic evening and to share the details! So it feels weird when people ask me the specifics. I have also noticed it is kind of a competition among lesbian moms for the "dream" insemination. Which many of us know things don't quite work out with flowers and romance, and we resort to injections and cathaters in a lab.
Which one gave birth question:
So far, no one has asked us this. When DP has him during the day (she is the SAHM) people assume she delivered him. She's never corrected that. Actually, I have overheard her answering childbirth questions in the first person :LOL
When I am with them, people look at my hair falling out and loose skin and they know who birthed baby

So when we are all together they direct the questions about birthin' to me.
I think because Julie is a SAHM to our son, the "who birthed him" question isn't a biggie to us. But when he's older and in school and DP doesn't have that SAH edge, I think we will be deliberately vague about who birthed him.
Agh, I wrote a lot

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