I had a lesbian neighbor who asked me to cooperate with her and another woman in having a child. Didn’t get into details (but I did thank her for raising the value of my property). I used the excuse that I was too sensitive for something like that. Scared is the truth. They broke up less than a year later.
But yeah, homosexuals can have kids, she could have found a gay man to do the deed. They can make babies for each other and/or adopt. Sperm bank sounds less complicated.