Historical Romance book from 90s or earlier where MMC gives FMC sponge dipped in vinegar for contraception. He did not want kids due bc he was afraid he will eventually develop mental illness like his dad.

Just trying to help someone find a book

“In the early 90s I read an HR book and have been looking for it again ever since. I cannot remember the h name but I believe the H name was Marcus. I don't recall why they married but she didnt know him when they did. The opener is her walking down a long road with all her belongings to his home. When they finally have sex he brings her a bag of sponges with strings attached and a bottle of vinegar to dip them in. I believe the first time they were together he put one in for her. The whole story revolves around him refusing to have children because his father went insane and he was afraid he would too. In the end he finds out his dad wasn't "crazy" he had syphilis. Someone please help me find this book. It has haunted me for about 20 years. The use a birth control is very unique to a HR book and I'm hoping that will stick out for someone!”