I brought Angel home about a year ago. Bailey was 20 months then. Bailey was so mad at me she would not even look at me. Angel is just happy go lucky and would jump into Bailey's bed with her
and would want to play.
It took Bailey about a month to accept her fully. They now sleep cuddled up in one of their beds. It helps to have seperate bowls, food and water although they now both eat out of one then move on to the next.
And to have their own toys and believe me they know what is theirs!
Give it time and don't force it. Just make sure you give both a lot of attention.
Mine are together everywhere now. My avitar picture shows how they normally sleep, back to back.