I could totally be this woman. I'm completely computer illiterate. Also, my husband is an IT whiz. If I were not his wife and I had been friends with him forever, I would ask him if he wouldn't mind coming to fix my computer without having any ulterior motive except for maybe cheap or free labor (I would offer pizza, wings, or beer...again not trying to get him drunk but hey, he's a man and might appreciate a 12 pack).
I'd be leery of the Best Buy Geek Squad because they'd probably try to sell me something I didn't need or take advantage of the fact that I don't know squat about computers and try to tell me I need this service and that service and pretty soon my bill is sky high.
I think you're being oversensitive. Maybe her hubby can't do it because he's computer illiterate too. And, if they're friends it seems like it would be normal and natural to ask a friend for help. She just probably wants to make sure her computer works so she can surf the internet and save her pictures as opposed to thinking of seducing him at her lair and then jumping his bones.
What would I do? If my husband, an IT whiz, had a female friend ask for help with her computer I wouldn't even think twice about it...unless she worked at a strip club and wanted him to meet her there (I kid.).