Think about who your wife is...would she leave the kids to see her sister to complete a D? Probably not.
Just guessing...I think she is looking at random options and testing your reaction. Are you giving her space or controlling her? Are you showing a loving reaction or a "I only care about work" type of reaction. She probably does want to go and feel the freedom of a single person. That desire might have been there in the past, too.
Considering letting your W see you reading tonight or tomorrow sometimes. That shows her you are serious enough that TV, surfing, and other distractions won't take you away from becoming better. It might also make her curious to find out what other things you are working on.
The title tells her that you aren't looking to be nice to get a good divorce settlement, too.
Have a great week and try to stay clear of the thoughts of blaming or self-preservation just yet. Remember, it's only been a few weeks (thank God, probably feels like a year!)~