what should I do?

This married woman I always meet with her husband always glancing at me when I am not looking. I started glancing at her and one time she caught glancing and immediately raised her eyebrows. Next time we met she acted as if she doesn't see me but caught glancing and looked away quickly.when I talk to her she look at me and when I make jokes she laugh but hardly speak to me. I got a add request from her younger son and a week later a missed call on messenger from the son account he is around 6 or 7 years old. I tried texting the account with Hi how are you but no response and messages take long to be opened although can be read without opening. I don't see her much but I get the alot of attention from her when we meet not forgetting her husband is present. I really really do like her what should I do?