sister likes the guy i’m talking to ?🤭

so my sister has been making comments and talking so much like every 5 minutes about the guy i’m talking to and she is always complimenting him and saying things like “ oh i want him to see me” and a bunch of things when she tells me these things i just stay quiet and get serious i don’t say anything but do you guys think i should ? help please or am i going crazy ? and not to mention my sister is talking to his twin brother so they have a thing and i can’t come across why she acting like this with my guy, they(my sister and the guy i’m talking to) spent like 2 hours talking on the phone the other day.. comment down below what you guys think.