PLEASE HELP! My Boyfriend Wants Me To Accommodate His Ex With Three Kids

I own a three-bedroom townhouse.

One of the bedrooms is home to my office, but my two-year boyfriend moved in six months ago.

Our plans to wed have been put on hold while he guards his kid, five, and two older girls.

He came to me to tell me that his ex can no longer afford her apartment due to the drastic rent increase and is preparing to leave Accra and relocate to her parent’s home.

According to my boyfriend, he doesn’t want to stay far away from his children and doesn’t want to keep his children away from their mother.

He is proposing that they move in temporarily with us.

This will mean I give up my office, or he moves in with his ex to help out financially, and both of those options will destroy our bond.

What Do I Do?