eating by christains

asalaamwalaikum respected mufti
my neighbour will be inviting me and my family to their house for super sometime soon as she says.we are living as neighbours for the past 20 years now.they are very good neighbours and we have never been inside each others house so far .she says they like to welcome our daughter-in-law.
what do i say when she does invites us as they are christians.i am scared and also dont want to offend
her.