Looking for Information for Francine Bemelaar of Utrecht Netherlands

Francine Bemelaar was the sister of my husband's mother Wilhelmina Bemelaar/Kelderman. The girls were born in Utrecht, Netherlands in the early 1900's. There father was a station master with the railway. Francine married Louis van Gucht and lived in Rotterdam until her death?. They have 4 living children in the Rotterdam area. Language barriers stop us from getting information exchanged. Recently my husband's mother passed away and she was the keeper of the Bemelaar/van Gucht family events. The information seems to have been misplaced or unable to be found.
I am lookng for Francine Bemelaar/van Gucht birthdate, marriage date and death date. I have the names of the children and we correspond but the language exchange of information is not working well.
Help would be appreciated. Pat