You can't in the official version, you would have to use some utility or the compressed version to do it... but as I've commented on other occasions, it's an easy game, you don't need to use cheats... having more money won't allow you to buy more objects since the game isn't ready for this yet; getting tenant points is very easy; and it's not recommended to manipulate girls' stats
If you need help or have doubts, just ask here
Ehmmm... i guess you mean the third option that is unlocked after watching the romantic movie; well, Gina is deep asleep in it, so she doesn't consciously suck on you... it's more like a Jessy and Tony joke, hahahahahaha
And that part is not unlocked when reaching 100 points of sexuality with Jessy, but repeating several times the dildo scene