chance of multiples??

I have 6 kids. all singleton pregnancies. my mom was pregnant with my youngest sister & she had a fraternal twin but didnt develop & miscarried the twin early on. if I were to get pregnant again do you think my chances for twins could be higher since they say having multiple kids increases chance of twins along with twins running on moms side or unlikely? not sure if we're done having kids but would like to prepare myself mentally just in case!