Dreams involving family members and significant others can evoke strong emotions and feelings. Dreaming of your mother and husband making out may reflect underlying concerns or conflicts in your relationships. Here are a few interpretations to consider:

1. Jealousy or Insecurity: This dream may symbolize feelings of jealousy or insecurity within your relationship with your husband. It could indicate a fear of losing his affection or attention.
2. Family Dynamics: The dream might reflect your feelings about how your family and partner interact. It may suggest that you are processing your feelings about your roles within your family and your marriage.
3. Integration of Relationships: Sometimes, such dreams can point to a desire to integrate your familial and romantic relationships more harmoniously. It might indicate a wish for your husband to get along with your family or vice versa.
4. Symbolic Representation: The actions of your mother and husband could symbolize nurturing and support in your life, reflecting aspects of care and love that you seek or feel you have in your relationships.

Consider how you felt during the dream and upon waking, as these emotions can provide further insight into its meaning. If this dream resonates with current feelings or situations in your life, it might be worth exploring those feelings more deeply.