Giving a sincere and appreciative 70th birthday speech to mother-in-law will certainly add to the enjoyment of the celebration. So choose one of ours. They speak of what she means to your family and how much she has influenced family members over the years. They mention her attributes or her acts of kindness. Tell how she has helped two families become one extended clan.Each 70th birthday speech to mother-in-law can be used individually or you can select sections of all the speeches that best describe her and then toast her with a specific toast. Failing that, why not toast her instead with one of our short poems? It will add an unusual touch to the party.