Hook the loops of your bag between your forearm crease, let it swing not lag whilst you walk to see your niece.
Your nephew is ill in hospital, your parents too ill to help out, your sister is depressed, it's postnatal, and you've been there from the beginning, throughout.
Those aren't tears, but the effects of the wind while you walk nervous to see. ******* in your cold coat you’ve thinned, but no one will notice nor disagree.
As you’re there to help, encourage with wise words, short bursts of helpful blurbs will satisfy your sister just enough for her to get through.