Worried my moms visit will ruin progress I’ve made on my self esteem

I have not seen my mother in 9 years. I was a teenager the last time she saw me. In the last year I’ve had to do a lot of work to repair my confidence. That work led me to realize she was the source of a lot of my self esteem issues, her endless criticism, bullying and taunting made me hide myself.

I’ve done so well at hiding myself that it’s taken me 28 years to be comfortable enough to finally start being authentic with others and even now sometimes I revert to being not being myself and mirroring others for approval/ acceptance and it really hurts my ability to connect with others.

I’ve been making slow but meaningful progress and I’m afraid my moms 3 month visit this summer will set me back. Any advice on how not to revert back to that scared child while living with my mom for 3 months?