HIS mom said she saw me CHEATING

LinABoo💕🐿
Ok... Now I'm pissed beyond MF BELIEF. He recorder her saying she saw me cheating and out with another guy when I only be HOME! Or with my mom. I been in the house 3 DAYS STRAIGHT and I personally don't think she even knows what my face looks like she don't even pay attention. We been together for 3 years. And she gone say " I saw your girl cheating, she out with other dudes, next time I'm gone ft or video you cause she out here trying to be sneaky" and some more shit and he don't even believe me. We already going through some stuff and this does NOT help !!!!