I' d recommend that you first check that the sims in question aren't related in any way. If their relationship is high enough, I'd check their mood. To find the action, the 'Special' or "Romantic' interaction menus could have what you need.
I'm sorry I couldn't be more helpful as I haven't yet done it myself.
no only you can proupse to them
you need to keep using a lot of romantic interactions. eventually you will have the option to propose to your sim.
On sims 2 and 3 you can. I'm not sure about sims 1.
1.You have to have two adult sims in love. 2.Click on the sim your sim loves there should be something that's says propose. 3.Click propose then click engagment then there will be a little video of your proposing to the other sim.
Well it depends on what version of the sims you are playing. On the Sims 2 pc, the sims have to be in love for you to choose the option to propose engagement. There is no option to propose on the Sims 2 Nintindo DS. Most Sims 2 wii and p2p games you cannot propose. Although for Sims 2 xbox you can propose and get married but you cannot have children or age. The Sims 3 pc you can propose, marry, have children, the whole deal. Sims 2 Castaway you can propose after you go through the whole story line and go into freeplay. In freeplay you can propose after your sim is in love. That's about all I know. Happy simming!
Your sim needs to be best friends with the other sim before they can be in a romantic relationship. Once you sim's relationship is high enough with the other sim, your sim will have the option to propose.
If you are a girl, get your sim to date another sim then go into 'be romantic' with the sim you are dating. Scroll down and click propose marriage. This may not work until you are partners.
Yes Vampire Sims can become pregnant in the sims 3. In fact vampirism is genetic in sims 3. eg: Sim+Vampire= Sim/Sim/Vampire/Vampire Sim+Sim=Sim Vampire+Vampire=Vampire
Once you make someone a romantic interest to another sim, you have to keep doing romantic actions until the other sim thinks your sim is extremely irresistible then under romantic action there will be going steady then there will be propose marriage.
It depends whether you are on sims2 or not, if you are on sims 2 you make them fall in love untill their relationship metre is up to munber 75 but it could be less, but 75 is the highest untill you can propose. Anyway you then click on one of your sims and then make him/her click on your other sim then you click on propose then marrige/ get engaged and there you are! If you are on sims 3 you will have to make them love each other untill they are boyfriend and girlfriend/ going steady where you will then probably be able to propose. You click on propose then get married!
no, there is no murdering in the Sims
It will, in fact, it gives you a greater chance of conception (getting pregnant)!