If you’ve decided to proceed and you feel confident that you can be discreet, try to visit your mother-in-law when no one else is present. Choose a private location, such as an empty house where no one is expected to drop by, or any other quiet, out-of-the-way location. Sit across from your mother-in-law and attempt to make eye contact; smile frequently as you chat with her. Complimenting her on her beauty or sexiness may help to take things to the next level - many women are susceptible to this sort of flattery. To see if you’re on the right track, attempt to hold her hand or touch her knee - if she shrinks away from your contact, you are probably making a big mistake. Watch her body language and facial expressions as you make your move - if she’s interested, she will move closer to you, smile a lot, and return your compliments with flattering statements of her own.
Wine, flowers, candy and other romantic tokens of affection may help to get your point across. If things begin to get physical, be certain that both of you understand the boundaries of the relationship. You must decide together just how private your relationship will be, and what to do if your affair is discovered. If you choose to be intimate, safe sex should be practiced every time you are together.