A 22year female and dating and eventually marry a 41year old divorcee with 3 kids.?

A 22 year female and dating and eventually marry a 41year old divorcee with 3 kids. This lady was sponsored to the university by this older guy, even took good care of her, but never live in the same house with this lady and his children for some reason I might not know. This lady seems to deeply appreciate her husband, but certainly not in love with him as she is on an ongoing affair for 14months with another younger guy. She is kind of afraid to divorce this old man because of societal pressure or seeing herself as an ingrate. She is also paranoid on how to cope with her teenage step Children when herself is now 26. What is the prospect of this marriage. Should she get permission from this guy to divorce of what could she do as there's no prospect she might stop her affair, even if her present boyfriend goes, she might just take up another. Luckily for her, she's got no kids.