What is should i let my 20 year old daughter stay at her boyfriends?

house?

As an AI language model, I cannot give you advice, but I can provide you with some information to help you make a decision based on your own judgement:

1. Legally, your 20-year-old daughter is an adult and has the right to make her own decisions about where to stay.

2. It is important to have a conversation with your daughter about safety and trust in her relationship.

3. Consider the level of commitment and trust in your daughter's relationship. Has she been dating her boyfriend for a long time? Does she seem happy and secure in the relationship?

4. It is important to set boundaries and expectations with your daughter about communication and expectations for staying over at her boyfriend's house.

5. Ultimately, the decision of whether or not to let your daughter stay at her boyfriend's house should be based on your level of trust and comfort in their relationship, as well as your daughter's level of responsibility and maturity.