she needs to see her gynecologist for a careful exam. i don't know your wife's age but vaginal dryness/atrophy is common as natural hormones wane. she may just need an estrogen cream and/or some vaginal lubricant but it would be wise to make sure there is nothing else wrong first. i am sure this can be solved and both of you will be able to enjoy healthy sexual experiences again.
wife & i have not had sex for over 10 years. now we are trying but w/ just finger she has vaginal pain. due to illiness we somehow let an active sex life go away. now in our later years our health has improved and we would like to add sex but there is vaginal pain in foreplay.