Ok - so how do you get the pregnancy mechanics to work? I got the scene when you ask her to remove the IUD and she says she will in a few days, and you are supposed to buy the plan b pill - did that and nothing... can't get it to trigger.
Get the Male virility X from the convenient store (or the sex shop) or the Hog force plus from the online shop and use it during the morning period on the day when you will visit Susan. The plan B pill is supposed to work (not sure if it does anyway) if Kevin has sex with Susan before you do but that never happens. Just keep fucking Susan and especially when the day on the tracker is close or on point with your current day (Susan's tracker is not working (bug) but you can use Megan's to figure out if you are close enough to Susan' fertile days).
The thing is, that the pregnancy system is a bit screwed up for Susan. For now, only Susan can be impregnated and although you can monitor every girl's (except Susan) cycle by installing the Fertility Tracker, even if you get Susan pregnant and you can see it through the status page on your phone, as soon as you visit her in the office the whole pregnancy bar and the cycle tracker disappears completely. I am not sure if it gets reset or it is there but I cannot see the tracker. The one thing that is sure is that after I got her pregnant and lost the tracker I did not impregnated her again.
If for any number of reasons, nothing works for you. Tag me and I will send you a save.