Falsely accused

How would you deal/react after being falsely accused by your mother-in-law for stealing? We stay with his family after marriage while waiting for our BTO (coming soon in 2022), and through this period of time, a series of items becomes missing from his family like headphones, Starbucks vouchers, jewellery, portable chargers, even my own thumbdrive containing my sensitive data like passport details and NRIC details. Ever since the first item went missing (headphones), my mother-in-law started to suspect I'm the one who takes their things which unfortunately cannot be found under my possession especially since my husband is a civil servant. All other items started to go missing one after another and my mother-in-law continues to suspect me, locking her wardrobe, trying to hide things from my sight, sometimes even trying to snoop into our room on the pre-text of vacuuming our room. The last item that went missing was a gold necklace and she dragged my husband out of the room to fill him about the "crime scene" and she didn't seem to believe us when we said we have no idea there was even a gold necklace because it was never worn and we don't know what it look like. She started to ask me if I am the one who took any of the missing items and if I did, she will forgive me and not make a big thing of it, and all I had to do was to take 1 or 2 of those missing items out. I was dumbfounded and of course theres nothing for me to admit to. All of a sudden she started to cry and said she's sorry for falsely accusing me all these while. Right now I have no idea how I'm supposed to face his folks, it's so fucking awkward. I can't act like this didn't happen and be my normal self around them (we used to talk, joke around like friends) and for days now we don't talk or even look one another in the eye at all.