That's what I get for skimming a post. I read the we will be home at 8:30 part but missed the "you can come over then part". Sorry.
I do think that in the middle of a custody battle the parties DO owe each other. Actually they owe it to themselves even more. In this case it probably won't make much difference since there are SO many things they have to show BM as unstable, but they still need to show their willingness to co-parent even if she doesn't. I'm not saying that because MA is a SM I'm saying it because it makes sense that whoever wants custody should do every single thing they can to facillitate a relationship between the child and other parent. Does it get old? Hell yes. I am the poster child for "sucking it up", but I do it.
When we were together, you said you'd die for me. Now, I think it's time you kept your promise.