Cohabitation and Kids: How New Partners Can Affect Child Custody

After a divorce, it’s not uncommon for ex-spouses to move on to new romantic partners — in some cases, even remarrying, or at least cohabitating. New romantic partners can often upset the delicate balance of post-divorce family life, especially where children are involved. In addition to worrying about whether introducing a new partner is right for a child, many parents also worry about whether cohabitation with a new partner could negatively affect child custody or visitation rights. While the answer generally is “no,” there are exceptions, as the attorneys at our Stockton child custody law firm explain.  

Cohabitation Alone Does Not Automatically Affect Child Custody

Living with a new partner in and of itself does not affect child custody or visitation. When making child custody and visitation decisions, California family law courts are primarily concerned with ensuring the health, safety, and welfare of children rather than judging parents’ lifestyles. Assumptions about “immoral” or “nontraditional” living arrangements (e.g., non-married partners, same-sex partners, etc.) carry no weight under California law and do not influence child custody decisions. 

Factors Courts Consider in Child Custody Decisions 

Courts are guided by the best interests of the child when making child custody decisions, including those in which a parent puts cohabitation in issue. When determining whether a parent’s cohabitation with a new partner could negatively affect a child’s best interests, courts may consider the following factors: 

• The partner’s background, such as a history of criminal activity, substance abuse, or domestic violence
• The partner’s behavior, such as whether the new partner is interfering with the established parenting plan or putting the child in physical danger
• Household stability, including whether the parent with the new partner moves frequently or has had multiple romantic partners
• The child’s emotional state, including the new partner’s impact on their school performance, social relationships, and established routines

In addition to the best interests factors, courts may also consider morality clauses in child custody agreements, such as provisions limiting overnight guests when children are present. 

Cohabitation as a Basis for a Child Custody Modification 

Cohabitation alone is generally insufficient to support a request for a child custody modification. However, if a parent can show that the other parent’s cohabitation with a new partner is negatively affecting their child’s best interests, courts may be willing to consider a modification.  But child custody modifications require hard proof — mere suspicion or disapproval of the other parent’s cohabitation is not enough. Relevant evidence for a child custody modification could include, for example, documentation of the partner’s drug use, declines in school performance after the child’s other parent and the new partner moved in together, or a police report detailing an incident of domestic violence by the new partner. 

Work With the Attorneys at Our Stockton Child Custody Law Firm to Ensure Your Child’s Best Interests 

If you’re concerned that your ex-spouse’s new partner is negatively impacting your child’s health, safety, or welfare, an experienced attorney can help you put forward the best case for a child custody modification. For more information, please contact an attorney at the Stockton child custody law firm of McKinley, Conger, Jolley & Galarneau by using our online form or calling us at 209-477-8171