So yesterday's events were fun. Always a classy experience dealing with BM.

The backstory:
BM calls my husband at work and announces that she "lost track of time" and wasn't going to make it in time to get kids from school. (She was off, not working). She wanted DH to leave work, go get kids, and bring them back to work until she could get there to get them. DH had already used his two breaks for the day and could not leave work to go get kids. I happened to be working at the same location as DH that day - we work for the same company. DH found me and asked if I would run down and get them. Work is located 5 minutes from the school. BM asked five minutes before the kids were supposed to be picked up from school. I grabbed my keys and ran out of work. I hurried down to the school and got there in time, got the kids and went to bring them back to work with me. As I was leaving the school, I noticed BM's car two cars in front of me. She pulled into the front parking lot at work and I pulled into the employee parking lot where I always park. My intention was to get the kids to DH so that he could do the exchange. I felt this was best to avoid confrontation due to BM's many previous outbursts.

As I was getting out of my car, BM flies up in hers. She gets out of her car and approaches me saying, "How about you don't pull away....."

I did not allow her to finish. I replied, "How about you pick your own kids up from school when you're supposed to and I won't have to leave work to do it. You only have to get them two days this week. You couldn't get them one of those two days?"

She says, "You didn't have to leave work. I called (DH Name)."

I said, "He is also working and shouldn't have to leave work either. Maybe you could try making your kids a priority."

I dropped the kids book bags at her feet and walked inside while she screamed at my back "Why don't you kiss my ass you fucking cunt ass bitch. That's right you better walk away."

DH then receives this classy exchange via text:
BM: I owe your fucking cunt wife a punch in the mouth. Next time don't worry about your kids. You both could give a fuck less about them anyway.
DH: You are the biggest piece of shit waste. Everyone goes out of their way for you and you act like an asshole. Unbelievable.
BM: She talks to me like that in front of the kids, she's done. Tell her I promise that.
DH: What about SD's meds? (SD has pinkeye. BM was supposed to get SD meds after she picked kids up from school.
BM: Oh yes, (DH Name) it was me. Always fucking me. She saw me sitting there. She pulled all the fucking way around the back.
And that wasn't for me you selfish prick. IT was for your kids.
That bitch has no right to be anywhere near my kids.
DH: What about SD Meds?
BM: I don't know. Couldn't get them just then. Needed to cool down before I said anything else.
DH: Guess you don't care about your daughter then. That sounds like something stupid you'd send to me. I'll meet you at 8 at (location) later with SD meds. Not going to get into some stupid argument with you though. See you then.
BM: Oh honey, you're so cute when you try to insult me.

BM sent her other son (not to DH) to get the meds.

Out of DH and I, I was able to leave work without getting into trouble.