i am 100% ok with 4. an idea i have is that perhaps she moved in next to him while she was pregnant or just after she had the baby, so alex was around pretty much the entire time. he's 37, so there's a small age difference. alex likes kids, so he would have been willing to help her. it might be less daunting to have less years of stuff to figure out. idk. i'll leave that up to you.