Help, My Mother In-Law Wants to Bathe With Me

Please help me. I went to visit my fiance at his village because there was a family occasion going on. I came two days before the occasion and stayed 3 days after the occasion.
Each time I want to take my bath, my would be mother-in-law will carry her bucket and want us to bath together. I’ve been avoiding her but it is getting out of hand.
What does she want to see? What is her motive? Please I need solutions to this problem.