AS far as apologizing, well maybe this is a good opportunity to show a different you regarding the S.
Bring up the lst discussion and how you both got heated, you can apologize for your reactions and validate how she felt. Then go into stating the meotions can easily get in the way of making this easy. then as Mu stated, bring up a question to her asking if she thinks having L handle this part would be better.
leave it at that, when she responds either way you listen and process what she is saying, do not hop into what you agree or disagree with. Tell her that is interesting thoughts and you would like to look at everything yourself. at this point come back here and let everyone review.
M 37 W 34
T 12 M 8 D 7 S 4
Need break 4/12/15 W no ring 7/7/15
Separate room 4/12/15 Separate living suggested 8/15 W moved out 11/1/15