Almost comically, Mycroft and Martha looked at each other.

"Sherlock, we still have a lot to- " Sherlock interrupted his brother. "Out, Mycroft." He turned to John's mother. " And you as well. We will take care of William today."

She opened her mouth, but Sherlock interrupted her. 'OUT."

She gave Sherlock a death glare, and looked at John as well, then made a portal and was gone.

Mycroft looked like he was about to say something, but he thought better of it, grabbed his umbrella, and left as well.